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प्रश्न
What will happen to the internal energy if work is done by the system?
उत्तर
First law of thermodynamics can be given as:
ΔU = q + W
If work is done by the system on the surroundings (work of expansion), then W is negative (-W). The negative value of ‘W’ signifies that energy has left the system as work. Therefore, internal energy of the system decreases.
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