The heat capacity of a bomb calorimeter was determined to be 31.5 kJ/oC. A 12.6 g sample of acetylene, C2H2, produced a temperature increase of 16.9oC when it was combusted in the calorimeter. What is the energy of combustion of acetylene in kJ/mol

Explanation:

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In this case, for this calorimetry problem, since the acetylene is burned into the calorimeter causing a temperature increase, we can infer that the combustion of acetylene releases heat which is absorbed by the calorimeter, therefore, the following equation can be written:

Which can be written in terms of the energy of combustion and moles of the acetylene and the heat capacity and temperature change of the calorimeter:

Thus, since the molar mass of acetylene is 26.04 g/mol, the resulting energy of combustion of the acetylene turns out:

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explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

the answer is c

tell me if wrong