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Question: a bomb calorimeter is filled with 84 atm of an...
Question details
A bomb calorimeter is filled with 8.4 atm of an unknown gaseous
hydrocarbon fuel and an excess of oxygen gas at a temperature of
23.9 °C. The bomb calorimeter has a volume of 1.4 L and a heat
capacity of 8.58 kJ/K. After the combustion reaction is complete
the final temperature of the calorimeter is found to be 74.0 °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.
kJ
(b) What is the molar heat of combustion for the reaction in
kJ/mol? Please give your answer to 2 decimal places.
(kJ/mol)
(c) Given the table of data below, what is the identity of the
unknown gas?
| Fuel | Chemical Formula | Molar Heat of Combustion |
|---|---|---|
| ethene | CH2CH2 | -1324.1 kJ/mol |
| methane | CH4 | -890.4 kJ/mol |
| ethyne | HCCH | -1309.5 kJ/mol |
| hydrogen | H2 | -285.9 kJ/mol |
The identity of the unknown gas is ( ethene, methane ,ethyne,
hydrogen)
(d) What is the heat of combustion for the reaction in kJ/g? Please
give your answer to 2 decimal places.
kJ/g
Solution by an expert tutor
