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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
- A electric dipole is placed at an angle of 30⁰ to a non-uniform electric field.
- In radioactive element, β-rays are emitted from
- An aicraft executes a horizontal loop of radius 1 km with a speed of 900 kmh⁻¹
- Suppose for some reasons, radius of earth were to shrink by 1% of present value,
- In a double slit experiment, the two slits are 1mm apart and the screen is placed 1 m
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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