Chemistry

Chemistry

Problem

The dissolution of 1 mole of NaOH(s)\text{NaOH}(s) in 100 mole of H2O(l)\text{H}_2\text{O}(l) give rise to evolution of heat as −42.34 kJ-42.34\,\text{kJ}. However, if 1 mole of NaOH(s)\text{NaOH}(s) is dissolved in 1000 mole of H2O(l)\text{H}_2\text{O}(l), the heat given out is 42.76 kJ42.76\,\text{kJ}. What would be enthalpy change when 900 mole of H2O(l)\text{H}_2\text{O}(l) are added to a solution containing 1 mole of NaOH(s)\text{NaOH}(s) in 100 mole of H2O(l)\text{H}_2\text{O}(l)?

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