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

1) When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter.

In the laboratory a general chemistry student finds that when 23.66 g of Cs2SO4(s) are dissolved in 105.90 g of water, the temperature of the solution drops from 24.54 to 21.19 °C.

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.60 J/°C.

Based on the student's observation, calculate the enthalpy of dissolution of Cs2SO4(s) in kJ/mol.

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

ΔHdissolution =  kJ/mol

2)

When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter.

In the laboratory a general chemistry student finds that when 9.81 g of CsBr(s) are dissolved in 101.90 g of water, the temperature of the solution drops from 24.14 to 20.93 °C.

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.89 J/°C.

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

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

ΔHdissolution =  kJ/mol

3) When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter.

In the laboratory a general chemistry student finds that when 8.81 g of BaCl2(s) are dissolved in 102.00 g of water, the temperature of the solution increases from 22.14 to 23.76 °C.

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.75 J/°C.

Based on the student's observation, calculate the enthalpy of dissolution of BaCl2(s) in kJ/mol.

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

ΔHdissolution =  kJ/mol

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Expert Solution

queen_honey_blossom answered 3 years ago
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