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 radiation of energy ‘E’ falls normally on a perfectly reflecting surface
  2. Radii of curvature of a converging lens are in the rato 1:2. Its focal length
  3. When 4 A current flows for 2 min in an electroplating experiment,
  4. There is a ring of radius r having linear charge densityλ and rotating with a uniform
  5. A block of 2 kg is kept on the floor. The coefficient of static friction is 0.4