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प्रश्न
A gas in a closed container is heated with 10 J of energy, causing the lid of the container to rise 2 m with 3 N of force. What is the total change in energy of the system?
संख्यात्मक
उत्तर
Given: Q = 10 J , Force= 3N,
Displacement = 2 m
Work done (W) = Force x Displacement
= 3 x 2 = 6J
By first law of thermodynamics,
ΔU = | Q | - | W |
= 10-6 4J
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