Navigate

The internal energy change in a system that has absorbed 2 kcals of heat

The internal energy change in a system that has absorbed 2 kcals of heat and done 500J of work is:

Options

(a) 6400 J
(b) 5400 J
(c) 7900 J
(d) 8900 J

Correct Answer:

7900 J

Explanation:

According to first law of thermodynamics Q = ∆U + W
∆U = Q – W = 2 x 4.2 x 1000 – 500 = 8400 – 500 = 7900 J

AIPMT2009
admin:

Related Questions

  1. A ball is dropped from a high rise platform at t = 0 starting from rest
  2. A satellite A of mass m is at a distance r from the centre of earth. Another satellite
  3. A beam of light of wavelength 600 nm from a distant source falls
  4. Which component of electromagnetic spectrum have maximum wavelength?
  5. The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second