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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 2.99 g of CuSO4(s) are dissolved in 109.10 g of water, the temperature of the solution increases from 23.83 to 26.84 °C.

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.58 J/°C.

Based on the student's observation, calculate the enthalpy of dissolution of CuSO4(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 1.18 g of KOH(s) are dissolved in 106.80 g of water, the temperature of the solution increases from 25.89 to 28.67 °C.

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.53 J/°C.

Based on the student's observation, calculate the enthalpy of dissolution of KOH(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 1.76 g of FeBr3(s) are dissolved in 113.90 g of water, the temperature of the solution increases from 23.09 to 24.94 °C.

The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.84 J/°C.

Based on the student's observation, calculate the enthalpy of dissolution of FeBr3(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 2 years ago
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