Concept: Thermochemical Equation
Thermochemical equations relate heat to stoichiometry. Notice that it takes 1 mole of CaO to release 64.8 kJ of energy.
Calcium oxide and water react in an exothermic reaction:
CaO(s) + H2O(l) → Ca(OH)2(s) Heat of reaction (Rxn) = -64.8 kJ/mol
How much heat would be liberated when 7.15 g CaO(s) is dropped into a beaker containing 152 g H2O.
a. 1.97 x 103 kJ
b. 508 kJ
c. 8.26 kJ
d. 547 kJ
e. 555 kJ
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