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Calculate the standard enthalpy change for the reaction of cobalt(II) chloride hexahydrate with sodium carbonate to form cobalt(II) carbonate and sodium chloride according to the following balanced equation:

CoCl2•6H2O + Na2CO3 → CoCO3 + 2 NaCl + 6 H2O

Given:
- The enthalpy of hydration of cobalt(II) chloride is -787 kJ/mol.
- The enthalpy of formation of sodium chloride is -411 kJ/mol.
- The enthalpy of formation of cobalt(II) carbonate is -718 kJ/mol.
- The enthalpy of formation of sodium carbonate is -1130 kJ/mol.
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<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

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<|begin_of_solution|>

The answer is 42.

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