The Thermochemical Equation Describing the Heat Change in the Decomposition

question 29

Multiple Choice

The thermochemical equation describing the heat change in the decomposition of limestone,CaCO₃,is given by CaCO₃(s) + 176 kJ → CaO(s) + CO₂(g) .What is the heat change that accompanies the decomposition of 25.0 g of limestone?

• A)7.12 kJ
• B)25.0 kJ
• C)44.0 kJ
• D)176 kJ
• E)1.42 × 10^-3 kJ

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