Home/
Competitive Exams/
NEET/
Chemistry/
Thermodynamics/
Question 23076
NEET Chemistry · Medium

Thermodynamics: Numerical thermodynamics MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Numerical thermodynamicsMediumQuestion 23076

Question

If a system absorbs 100 J heat and does 40 J work, change in internal energy is:

  1. A
    60 J
    Correct
  2. B
    140 J
  3. C
    -60 J
  4. D
    -140 J

Correct answer

60 J

Explanation

ΔU=q+w\Delta U=q+w, and here w = -40 J for work done by system, so 100 - 40 = 60 J.

Review Thermodynamics notesStart timed chapter practice