PART I a sample of acetone is burned in an insulated calorimeter toproduce carbo

Question

PART I
a sample of acetone is burned in an insulated calorimeter toproduce carbon dioxide gas and liquid water.
1) what is the molar enthalpy of combustion of acetone?

useful information (standard molar enthalpy offormation)
acetone(l) = -248.1 kj/mol
water(l)    = -285.8 kj/mol
CO2(g)    = -393.5 kj/mol
acetone   = C3H6O

PART II

A sample of liquid acetone is burned such that the heat from theburning is transferred into and aluminum calorimeter and its watercontents.
a) Use tabulated standard enthalpies of formation to calculate atheoretical value of molar enthalpy of combustion of acetone.

EVIDENCE - Observations on the Combustion of Acetone

QUANTITY MEASUREMENT mass of water
100.0g specific heat capacity of aluminum
0.91j/(g*k) mass of aluminum can
50.0g initial temperature of calorimeter
20.0 oC
final temperature of calorimeter
25.0 oC
mass of acetone burned
0.092g
b) calculate the molar enthalpy of combustion of acetone using theexperimental evidence.

c) calculate the percentage error by comparing the predicted andexperimental values.

d) does the experiment support the law of conservation of energy?if the heat is lost to the surroundings instead of beingtransferred only into the aluminum can and water, will theexperimental molar enthalpy be higher or lower? explain. thank you:]

P.S
For part 1, question 1 i have the answer as -1789.8kj/mol (right orwrong)
For part 2, questions (a), (b) and (c), the answers in the back ofthe text are
(a) -1.79MJ/mol acetone (you can leave it to kj/mol if youlike)
(b) -1.5MJ/mol acetone
(c) 16%
(d) and you dont necessarily have to answer :] QUANTITY MEASUREMENT mass of water
100.0g specific heat capacity of aluminum
0.91j/(g*k) mass of aluminum can
50.0g

Explanation / Answer

The answer for part 1 is right.

The heat given out by the combustion of acetone is absorbed bythe water and the can.

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