MDCAT Physics MCQ #3385

A thermodynamic system's internal energy increases by 100 J when 200 J of heat is added and it does 100 J of work. Is this possible?

MDCAT Physics MCQ #3385

  1. Question 1

    Q1. A thermodynamic system's internal energy increases by 100 J when 200 J of heat is added and it does 100 J of work. Is this possible?

    • A) Yes, always
    • B) No, never
    • C) Yes, if the process is isobaric
    • D) Yes, if the process is adiabatic

    Answer: No, never

    Explanation: ΔU = Q + W = 200 J - 100 J = 100 J, which matches the given increase in internal energy, so it's possible but not related to being isobaric or adiabatic. The statement is actually true according to the first law.