The mixture of gas and air inside a cylinder reacts,releasing 400 kJ of total energy.If the system does 250 kJ of work on the piston,how much energy is released as HEAT?

Question

Quizplus · Accepted Answer

According to the First Law of Thermodynamics, the total energy of a closed system is conserved. This means that the energy released by the reaction must be equal to the sum of the work done on the piston and the heat released to the surroundings.

Total Energy Released = Heat Released + Work Done

400 kJ = Heat Released + 250 kJ

Heat Released = 400 kJ - 250 kJ

Heat Released = 150 kJ

Therefore, the answer is A) 150 kJ.

The Mixture of Gas and Air Inside a Cylinder Reacts,releasing