Acetylene,C₂H₂,is a gas used in welding.The molar enthalpy of combustion for acetylene is -2599 kJ.A mass of 0.338 g C₂H₂(g)is combusted in a bomb calorimeter.If the heat capacity of the calorimeter is 5.54 kJ/°C,what is the temperature increase of the bomb calorimeter?

Question

Quizplus · Accepted Answer

First, calculate the moles of acetylene (C2H2) combusted: 0.338 g / 26.04 g/mol (molar mass of C2H2) = 0.01298 mol. Then, calculate the heat released: 0.01298 mol * -2599 kJ/mol = -33.74 kJ. Finally, calculate the temperature increase: -33.74 kJ / 5.54 kJ/°C = -6.09°C. Since temperature increase is a magnitude, the answer is 6.09°C.

Acetylene,C2H2,is a Gas Used in Welding

Acetylene,C₂H₂,is a Gas Used in Welding