When 2.65 g of calcium chloride (Ca C1₂) is added to 100.00 mL of water, the temperature rises from 23.0°C to 30.1°C. What is the molar enthalpy of solution?
When 2.65 g of calcium chloride (Ca C1₂) is added to 100.00 mL of water, the temperature rises from 23.0°C to 30.1°C. What is the molar enthalpy of solution?
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Problem 1
When 2.65 g of calcium chloride (Ca Cl₂) is added to 100.00 mL of water, the temperature rises from 23.0°C
to 30.1°C. What is the molar enthalpy of solution?
Problem 2
25.0 mL of 5 mol/L HCI is added to 30.0 mL of 1.50 mol/L NaOH. The temperature in the calorimeter rises from
15.0°C to 21.0°C. What is the molar enthalpy of neutralization for NaOH?
Problem 3
The molar enthalpy of solution for sodium acetate (CH3COONa) is -24.6 kJ/mol. How much sodium acetate is
needed to raise 125.0 mL water from 20.0°C to 24°C?
Problem 4
The molar enthalpy of combustion for methane (CH4) is -2242.0 J/mol. 0.50 g of methane is used to heat 45.0
mL of water at 24.0°C. What is the final temperature of the water (assuming perfect heat transference)?
Problem 5
To heat up my coffee (150.0mL) from room temperature (21.0°C) to 40.0°C, I use my Coleman stove which
burns propane. The enthalpy of combustion for propane (C3H8) is -2220.0 kJ/mol, determine how much
propane needs to be burned in order to heat the coffee up.
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