This website uses cookies to ensure you have the best experience.

# Plan & Design: The Relationship Between Relative Atomic Mass And Heat Of Combustion For C2 To C5 In Straight Chain Alcohols

530 words - 3 pages

STATEMENT: Alcohols are liquid fuels with energy values (ΔHc) that are related to their relative molecular mass (Mr). Plan and design an experiment that would allow you to establish the relationship between Mr and ΔHc value for C2 to C5 straight chain alcohols.
HYPOTHESIS: As Mr increases (number of carbon atoms per molecule) in straight chain alcohols from C2 to C5, the heat of combustion increases (ΔHc decreases).
APPARATUS + MATERIALS: 400cm3 water; 50cm3 each of: ethanol, propanol, butanol, pentanol; thermometer; 50cm3 spirit lamp; 100cm3 measuring cylinder; 250cm3 beaker; tripod stand; wire gauze; electronic scale; matches
METHOD: Fill the spirit lamp with 50cm3 ethanol. Weigh the lamp with contents included. Record this value. Set up the apparatus as shown below, using 100cm3 of water (measure using the measuring cylinder). Record the temperature of the ...view middle of the document...

18
=_d_ J
So heat of combustion of 1 mole of ethanol = db = _e_ J = e100 kJ = _f_ kJ
Since reaction was exothermic, ΔHc is negative. ΔHc = -f kJ mol-1

* Repeat these calculations for propanol, butanol and pentanol.

EXPECTED RESULTS: If ΔHc decreases from ethanol to pentanol (as number of carbon atoms per molecule increases), the hypothesis is supported. Otherwise, it is invalid.

SOURCES OF ERROR:
* Heat is lost to the environment and in heating the beaker, since not all the energy produced is transferred to the water. Hence, the calculated value for the heats of combustion of the alcohols are less than the actual values.
* Some water may have evaporated out of the beaker when heating the alcohol, and thus the mass of 100g of water may not have been maintained throughout the entire heating process.

--------------------------------------------
[ 1 ]. Mass of lamp with contents before heating – mass of lamp with contents after heating
[ 2 ]. Temperature of water after heating – temperature of water before heating
[ 3 ]. Heat was released to the surroundings, and the water increased in temperature.

## Other Papers Like Plan & Design: the Relationship Between Relative Atomic Mass and Heat of Combustion for C2 to C5 in Straight Chain Alcohols

### Acclimation to Exercise in the Heat

1265 words - 6 pages acclimating to heat. Acclimation is the ability of an individual to adapt in the change of its environment such as in heat, humidity and cold temperatures. To continuously exercise in heat and to have a tolerance to it is know as heat acclimatization. This is done for a specific amount time over a period of time for a certain amount of days. When it is done in an artificially controlled environment the process is known as heat acclimation. The

### Discuss The Relationship Between Gospel And Culture In The Mission Of The Church. To What Extent Is All Mission Cross- Cultural?

3400 words - 14 pages exactly the same practices. Some teaching is common but others diverge. "...For four centuries after the reformation one of the chief bones of contention between Catholics and Protestants (and some of the Protestants among themselves) was the interpretation of scripture' Interpretation of Scripture is a significant issue in the relationship between Gospel and Culture. The Baptists say, "Scripture is exalted to a unique position of authority

### The Ability to Use Past Innovations to Chart Future Shifts in the Relationship Between Science, Technology and Culture

1868 words - 8 pages The ability to use past innovations to chart future shifts in the relationship between science, technology and culture. Abstract The study of history can easily have a somewhat anecdotal purpose behind examining it, but with the advent of Winston’s ‘Modeling for change’ we are able to discern a concentration of social forces working directly on the process of innovations rather than being a force on innovation. It is for this reason that

### The Relationship Between Stella And Stanley In Scene 4 Of 'A Streetcar Named Desire'

967 words - 4 pages Look at scene IV of 'Streetcar' What does the scene tell us about the relationship between Stella and Stanley, and how does Williams portray this?In order to analyse this scene, there needs to be a clear understanding of what has happened prier to it.Scene three is set at Stanley's poker game, when Mitch leaves the game, to chat to Blanche, Stanley becomes more and more annoyed, and smashes a radio. Stella yells at him, and he starts to beat her

### Relationship Between Caliban And Prospero In Act I Of The Tempest

542 words - 3 pages learning me your language!” Prospero and Caliban’s relationship is that of a slave and a master. Is this respect it is very conventional, meaning that the more dominant character, Prospero, orders and abuses the lesser or weaker character, Caliban. But on the other hand, Caliban is never afraid to act out against his oppressor, which is unusual for a slave. The language between the two individuals shows how much contempt they have for one

### The Relationship between Height and Weight in Mayfield High School

956 words - 4 pages The Relationship between Height and Weight in Mayfield High School The hypotheses that I have made are effective but simple. I expect to find that: 1) Boys weigh more than girls 2) Girls are taller than boys in KS3 3) When I investigate the relationship between height and weight, I expect to find that the taller you are, the heavier you weigh. 4) Gender may affect the results that I will have

### The Myth of the Relationship Between Scent and Attractiveness

1315 words - 6 pages is no support in data for the claim that the substances increase the attractiveness of the wearers of the substances to the other sex (Winman, 2004). With the answers to all the three questions open, we would have much space in investigating the relationship between scent and attractiveness. References Demattè, M. L., Österbauer, R., & Spence, C. (2007). Olfactory cues modulate facial attractiveness. Chemical Senses, 603-610. Foster, J

### The Relationship Between Creation And Violence In Reference To The Book Bless Me Ultima By Rudolfo Anaya

719 words - 3 pages Creation and violence go hand in hand. Creation bore violence, and violence leads to creation. That does not mean that violence leads to a positive outcome per se, but that is does lead to a significant change and a new beginning. In the novel Bless Me, Ultima there are several examples of how creation is born from violence.In one of Antonio's dreams his entire world is ripped apart in front of his eyes: His three brothers turn into Brujas who

### The Relationship Between Art And Life As Presented In 'the Picture Of Dorian Grey' And 'the Decay Of Lying'

1707 words - 7 pages , expressing life and nature makes for bad art, life imitates art more than art imitates life, and that lying is the true aim of art . When applied to his novel The Picture of Dorian Gray these doctrines add an extra layer of meaning to the themes already presented, and this allows for a greater level of understanding. There are several instances during the narrative of the novel which show a relationship between the roles of art and life, and the ways in

### The Relationship Between Gasoline Sales And Vehicles Miles Of Travel

1581 words - 7 pages Selected Measures for identifying peer states. I found this data on September 28, 2008. To support the aforesaid relationship between my primary independent and dependent variables I have conducted a research and found sources that discuss the relation between traveled distance and sales of the gasoline. Particularly, Tom Doggers specifies the traveled distance’s relation to gasoline consumption reporting that “the impact of driving less was also

### Explore the Way the Writer Presents the Relationship Between George and Lennie in “of Mice and Men”

4004 words - 17 pages Explore the way the writer presents the relationship between George and Lennie in “Of Mice and Men” Of Mice and Men was written in the 1937 by John Steinbeck, he other well know books as the Grapes of Wrath and East of Eden, h also received a Nobel Prize for Literature in 1962. This book is set in the 1930s and set in California, his home region. During this time, the USA was suffering from a great depression, this meant that it was hard to

## Related Essays

### Investigation Of The Heat Energy Produced By Combustion Of Various Alcohols

2767 words - 12 pages able to say which alcohol is the best for combustion and which one is the worst to combust. · A good fuel should produce a lot of heat energy and use a small amount of fuel. (economical) · A bad fuel uses a lot of fuel and produces less heat energy. (non-economical) E=mc E= Energy M= mass of water C= Specific heat = Difference in temperature Using this equation I will be able to find out which fuel gives out the most heat energy and

### The Perception Of ‘No Time’ In Our Hectic Lives In Most Contemporary Societies Is Affecting The Relationship Between Family Members Within A Household. Design Can Create New Experiences To Help Us...

2074 words - 9 pages Food and eating practices are essential in everyday life, as we must eat in order to survive. When putting food and eating into theory, sociologist analyses food system in terms of their symbolic properties and the definition of their social relationship and process, which define them. According to Khare, socio-anthropological perspective on food can be analyses in three approaches: ‘food as a sociocultural context for illustrating the logic

### Investigation To Find The Relative Energy Release Of Five Alcohols: Ethanol, Methanol, Propanol, Butanol And Propanol

2305 words - 10 pages experiment so that the spirit burner does not burn anything under or around it. GRAPH Below are the calculations I have made for each alcohol to work out the KJ/mol that each of the alcohols actually released. All of the calculations use the equations below: ENERGY = MASS (OF H2O) x SPECIFIC HEAT CAPACITY (OF H2O) x TEMPERATURE CHANGE MOLES USED = MASS OF ALCOHOL BURNT / RELATIVE ATOMIC MASS J/MOL = ENERGY

### Design Of Structures In Respect To Heat Efficiency

1930 words - 8 pages studied window advantages alongside WERS to support my own theory that enclosed structures store more heat than transparent structures. Further studies on my part could branch into the other areas of structural design and placement providing a more in detailed plan for experimentation.REFERENCES'The Integration of Window Labeling in the Nationwide House Energy Rating Scheme (NatHERS) for Australia'.John Ballinger, Deborah Cassell, Deo Prasad