Write the sign convention of work done during expansion of gas.
Q.2 (vii) Write the sign convention of work done during expansion of gas.
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Answer: Work done during expansion is negative (W \(\lt\) 0).
During expansion the system does work on the surroundings and loses energy, so \(W = -P_{ext}\Delta V\) is negative (\(\Delta V \gt 0\)).
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· 29 Oct 2026
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