A quantity of 2.00 g of calcium carbide is reacted at 500.0 K with excess of...

A quantity of 2.00 g of calcium carbide is reacted at 500.0 K with excess of liquid water in a closed container fitted with a piston. The only two products of this reaction are ethyne and calcium hydroxide calculate the work done by the production of C2H2 gas against an external pressure assume the reaction proceeds until the pressure of the gas produced equals the external pressure (atmospheric pressure). Assume that the reaction proceeds until the pressure of the gas produced equals the external pressure.

Expert Solution

CaC2 + 2 H2O -------------------------> C2H2 + Ca(OH)2

64g 26g

2.g ?

mass of C2H2 formed = 2 x 26 / 64 = 0.8125

moles of C2H2 = 0.8125 / 26

= 0.03125

work done = n R T

= 0.03125 x 8.314 x 500

= 130. J

queen_honey_blossom answered 2 years ago

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