If ∆U and ∆W represent the increase in internal energy and work done by the system

⇦

⇨

If ∆U and ∆W represent the increase in internal energy and work done by the system respectively in a thermodynamical process, which of the following is true?

Options

(a) ∆U = – ∆W, in an adiabatic process
(b) ∆U = ∆W, in an isothermal process
(c) ∆U = ∆W, in an adiabatic process
(d) ∆U = – ∆W, in an isothermal process

Correct Answer:

∆U = – ∆W, in an adiabatic process

Explanation:

BY first law of thermodynamics, ∆Q = ∆U + ∆W
In adiabatic process, ∆Q = 0 ∆U = – ∆W
In isothermal process, ∆U = 0 ∆Q = ∆W

Related Questions:

1. Van der waals,equation of state is(p+a/v²)(V-b)=nRT. The dimensions of a and b
2. A transformer having efficiency of 90% is working on 200 V and 3kW power supply
3. Which is incorrect about thermal process
4. A change of 0.04 V takes place between the base and the emitter when an input
5. The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated

Topics: Thermodynamics (179)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends