Q. 55.0( 1 Vote )

The internal energy of an ideal gas decreases by the same amount as the work done by the system.
A. The process must be adiabatic

B. The process must be isothermal

C. The process must be isobaric

D. The temperature must decrease

Answer :

1. The internal energy of an ideal gas is proportional to the temperature. Since internal energy is decreasing, therefore, the temperature must decrease.

2. According to the question, change in internal energy is equal to change in work done.

3. According to First law of thermodynamics,


Where ΔQ=heat supplied/extracted to/from the system

ΔU=change in internal energy

ΔW=work done by/on the system

4. We know for adiabatic process ΔQ=0. So, from first law ΔU=ΔW.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
JEE Advanced Level Questions of NLM48 mins
Work done in Thermodynamic ProcessFREE Class
Microsporogenesis & Megasporogenesis49 mins
DNA Fingerprinting42 mins
NEET 2021 | Transcription - An important Topic62 mins
Meselson and Stahl experiment49 mins
MCQs of Ecology for NEET52 mins
Interactive Quiz on Sexual Reproduction in flowering plants44 mins
Pedigree chart58 mins
Application of Biotechnology48 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses