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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
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Topics: Thermodynamics
(179)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An electric dipole of dipole moment p is placed in a uniform external electric field
- A current is flowing through resistance. A potential difference of 120 V
- If the dimensions of a physical quantity are givenby Mᵃ Lᵇ Tᶜ, then the physical
- For the normal eye, the cornea of eye provides a converging power of 40D
- The velocity of molecules of a gas at temperature 120 K is v. At what temperature
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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