How many grams of CaO must be added to 50.0 mL of water to make the temperature increase from 25.0 °C to 58.56 °C? The reaction is CaO(s) + H 2O(l) ↔ Ca(OH) 2(aq) -- ΔH = -83.7 kJ Assume the heat capacity of the solution is the same as pure water (4.184 J/g*°C), the density of the solution is 1.00 g/mL and there is no loss of heat to the surroundings.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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  1. How many grams of CaO must be added to 50.0 mL of water to make the temperature increase from 25.0 °C to 58.56 °C? The reaction is
    CaO(s) + H 2O(l) ↔ Ca(OH) 2(aq) -- ΔH = -83.7 kJ
    Assume the heat capacity of the solution is the same as pure water (4.184 J/g*°C), the density of the solution is 1.00 g/mL and there is no loss of heat to the surroundings.

    Key Concept:: Calorimetry and enthalpy change is an extensive property. V, d → m solution; ΔT, heat capacity → heat; ΔH→ mol of CaO → mass CaO
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