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Question
What is the change in the energy of the system if 500 cal of heat energy is added to a system and system does 350 cal of work on the surroundings?
What is the change in the energy of the system if 500 cal of heat energy is added to a system and system does 350 cal of work on the surroundings?
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Solution
The correct option is B +150 cal
Given,
Heat added to the system = + 500 cal
Work done by the system = - 350 cal
From the first law of thermodynamics,
ΔU=q+w
=+500−350ΔU=+150 cal
Given,
Heat added to the system = + 500 cal
Work done by the system = - 350 cal
From the first law of thermodynamics,
ΔU=q+w
=+500−350ΔU=+150 cal
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