Part 5: Combined Heat Calculations Substance Specific Heat AHfus for H2O: 6.01 kJ/mol H2O (s) 2.1 J/g°C 4.18 J/g C 1.7 J/g C H20 m AHvap for H2O: 40.7 kJ/mol H20 () Question #1: How many kilojoules of heat energy are needed to raise 23.0 g of H2O from -46°C to 109°C? Step 1: Calculate the heat needed to raise the temp of the ice from -46°C to 0°C. Step 2: Calculate the heat needed to melt the ice (solid to liquid). Step 3: Calculate the heat needed to raise the temp of the water from 0°C to 100°C. Step 4: Calculate the heat needed to vaporize the water (liquid to gas). Step 5: Calculate the heat needed to raise the temp of the gas from 100°C to 109°C. Step 6: To get the total amount of heat needed, ADD the amounts of heat calculated in steps 1-5. **Change all the amounts to kJ before you add!!! kJ TOTAL HEAT NEEEDED:

Part 5: Combined Heat Calculations Substance Specific Heat AHfus for H2O: 6.01 kJ/mol H2O (s) 2.1 J/g°C 4.18 J/g C 1.7 J/g C H20 m AHvap for H2O: 40.7 kJ/mol H20 () Question #1: How many kilojoules of heat energy are needed to raise 23.0 g of H2O from -46°C to 109°C? Step 1: Calculate the heat needed to raise the temp of the ice from -46°C to 0°C. Step 2: Calculate the heat needed to melt the ice (solid to liquid). Step 3: Calculate the heat needed to raise the temp of the water from 0°C to 100°C. Step 4: Calculate the heat needed to vaporize the water (liquid to gas). Step 5: Calculate the heat needed to raise the temp of the gas from 100°C to 109°C. Step 6: To get the total amount of heat needed, ADD the amounts of heat calculated in steps 1-5. **Change all the amounts to kJ before you add!!! kJ TOTAL HEAT NEEEDED:

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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SUBJECT : GENERAL CHEMISTRY 2 TOPIC : HEAT AND CALORIMETRY
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