CaO(s)reacts with Water to Form Ca(OH)₂(aq)

question 46

Multiple Choice

CaO(s) reacts with water to form Ca(OH) ₂(aq) .If 6.50 g CaO is combined with 99.70 g H₂O in a coffee cup calorimeter,the temperature of the resulting solution increases from 21.7 °C to 43.1 °C.Calculate the enthalpy change for the reaction per mole of CaO.Assume that the specific heat capacity of the solution is 4.18 J/g⋅K.

• A) -1.45 kJ/mol
• B) -82.0 kJ/mol
• C) -9.42 kJ/mol
• D) -165 kJ/mol
• E) -532 kJ/mol

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