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1. The heat capacity of a calorimeter is given as 1264 J/oC.   Suppose the enthalpy of...

1.

The heat capacity of a calorimeter is given as 1264 J/oC.   Suppose the enthalpy of solution for calcium chloride (MM=111 g/mol) in water is given by the thermochemical equation:

CaCl2(s) + H2O(l) → Ca2+(aq) + 2Cl-(aq)   ΔH = -81.0 kJ/mol.

Calculate the temperature change if 11.1 g of calcium chloride is dissolved in water in the calorimeter.

2.

Given the following data, calculate ΔH for the reaction of two moles of carbon monoxide with oxygen gasto give carbon dioxide.

2 C (s) + O2 (g) → 2 CO (g)                          ΔH = -221.0 kJ

3.

The heat capacity of a calorimeter is given as 1264 J/oC.   Suppose the enthalpy of solution for calcium chloride (MM=111 g/mol) in water is given by the thermochemical equation:

CaCl2(s) + H2O(l) → Ca2+(aq) + 2Cl-(aq)   ΔH = -81.0 kJ/mol.

Calculate the temperature change if 11.1 g of calcium chloride is dissolved in water in the calorimeter.

C (s) + O2 (g) → CO2 (g)                             ΔH = - 393.5 kJ

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Answer #1

& Mass of Call, (s) = 111g. moles of Calle (s) = mars 9 = D.lmoles Molas man for 1 mole, al = -81 kJ Now for oil mole, sn=-fo

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