For the irreversible reaction Ca+ 2C = CaC2 H 298 =...

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For the irreversible reaction, C_a+ 2C = C_aC₂, ΔH°298 = -60000 J.mole^-1. If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

A. 30000 J

B. 60000 J

C. 90000 J

D. 240000 J

Answer: Option C

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