1a. 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 when1.33 g of CaBr2(s) aredissolved in 103.70 g of water, the temperature ofthe solution increases from 24.23to 25.85 °C.
Based on the student's observation, calculate the enthalpy ofdissolution of CaBr2(s) inkJ/mol.
Assume the specific heat of the solution is equal to the specificheat of water.
ΔHdissolution =  kJ/mol
1b. In the laboratory a general chemistry student finds thatwhen 21.18 g ofCs2SO4(s) are dissolved in112.90 g of water, the temperature of the solutiondrops from 24.64 to21.92 °C.
Based on the student's observation, calculate the enthalpy ofdissolution of Cs2SO4(s) inkJ/mol.
Assume the specific heat of the solution is equal to the specificheat of water.
ΔHdissolution =  kJ/mol
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