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For an unsteady state closed system , energy balance is

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For an unsteady state closed system , energy balance is

(a) U+25B3E = U+25B3(U + PE + KE)

(b) U+25B3E = U+25B3(U + PE – KE)

(c) U+25B3E = U+25B3(U – PE -KE)

(d) None of the mentioned

The question was posed to me in exam.

The above asked question is from Energy Balances without Reaction in section Energy Balances of Chemical Process Calculation

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Correct answer is (a) U+25B3E = U+25B3(U + PE + KE)

To elaborate: U+25B3E = U+25B3(U + PE + KE).

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