Hi aspirant,
As we know that,
dq=dU+PdV
When the volume is kept constant dV=0
PdV=0 and hence dq=dU
Therefore dU= 200J
Hope it helps!!
Question : The first law of thermodynamics is simply the case of:
Option 1: Charle's law
Option 2: Newton's law
Option 3: The law of heat exchange
Option 4: The law of conservation of energy
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