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When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving)...

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Chemistry

When a solid dissolves in water, heat may be evolved orabsorbed. The heat of dissolution(dissolving) can be determined using a coffee cupcalorimeter.

In the laboratory a general chemistry student finds that when0.68 g of KOH(s) are dissolved in104.30 g of water, the temperature of the solutionincreases from 22.14 to23.80 °C.

The heat capacity of the calorimeter (sometimes referred to as thecalorimeter constant) was determined in a separateexperiment to be 1.82 J/°C.

Based on the student's observation, calculate the enthalpy ofdissolution of KOH(s) in kJ/mol.

Assume the specific heat of the solution is equal to the specificheat of water.

dHdissolution = ___kJ/mol

When I type the answer, will it have to be negative?

Answer & Explanation Solved by verified expert
4.3 Ratings (506 Votes)
q q water q calorimeter mcT Ccal T    See Answer
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