Question

Hello! Multiple choice questions please, need a brief explanation if possible.
In a certain process a gas ends in its original thermodynamic state. Of the following, which is possible as the net result of the process?

a. It is adiabatic and the gas does 50 J of work
b.The gas does no work but absorbs 50 J of energy as heat
c. The gas does no work but loses 50 J of energy as heat.
d. The gas loses 50 J of energy as heat and does 50 J of work.
e. The gas absorbs 50 J of energy as heat and does 50 J of work

Answer 1

The last one, e, is the right one.
I could explain it to you if you tell me exactly what makes you doubt about the answer.

Answer 2

I was down between d. & e. can you explain the diff between the two? Does doing work make it lose energy?

Answer 3

Of course. That is one of the basic laws of thermodynamics. When the gas gain energy in a form of heat, it means that its molecules begin to move faster. That's what temperature basically is - the microscopic vibration or motion of molecules or atoms. When that gas does work, it sort of transfers the motion of its molecules to the object that it does work upon. Energy is defined as the ability to do work. When you do work, you loose energy.

Answer 4

ok thanks !