A piston exerting a pressure of 1 bar rests on the surface of water at 10 0 ∘ C . The pressure is reduced to a small extent and as a result 10 g of water evaporates and absorb 20.0 kJ of heat. The val

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A piston exerting a pressure of 1 bar rests on the surface of water at 10 0 ∘ C . The pressure is reduced to a small extent and as a result 10 g of water evaporates and absorb 20.0 kJ of heat. The value of Δ H vap. ​ of water is

TestHub · Accepted Answer

Heat absorbed by 10 g of water = 20.0 kJ. Heat absorbed by 18 g of water = 20.0 × 10 18 ​ = 36 k J . Therefore, Δ H v a p ​ of water = 36 kJ mol⁻¹

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