A bomb calorimeter is filled with 2.8 atm of an unknown gaseous hydrocarbon fuel and an excess of oxygen gas at a temperature of 20.3 °C. The bomb calorimeter has a volume of 2.7 L and a heat capacity of 6.4 kJ/K. After the combustion reaction is complete the final temperature of the calorimeter is found to be 123.7 °C. Answer the following questions based on this information.

( a) What amount of heat in kJ was released from the combustion reaction of the unknown fuel? Please give your answer to 2 decimal places.

(b) What is the molar heat of combustion for the reaction in kJ/mol? Please give your answer to 2 decimal places.

(c) Given the table of data below, what is the identity of the unknown gas?

FUEL .	CHEMICAL FORMULA	HEAT OF COMBUSTION
ethene	CH 2 CH 2	1324.1 kJ/mol
hydrogen	H 2	285.9 kJ/mol
ethyne	HCCH	1309.5 kJ/mol
methyl ethyl ether	CH 3 OCH 2 CH 3	2107.4 kJ/mol

The identity of the unknown gas is:

(d) What is the heat of combustion for the reaction in kJ/g? Please give your answer to 2 decimal places.