Heating/Cooling Curve Calculations1. Calculate the amount of energy given off when 17 g of vapor at 1002C condenses to 870Did a phase change occur? If so, which one? Is this endothermic or exothermic?energy=1066.92JUising Q=mxexAT 4Q=amoutof energy Qmxex4TC= ope cif ic heatcapacilywoterT:Chonge in temperature(7om=maDS9-17X94× (-15く)2. Calculate the amount of energy absorbed when 75g ice @ -4C melts to 31 CDid a phase change occur? If so, which one? Is this endothermic or exothermic?3. Calculate the amount of energy absorbed when 42 g of water at 21C heats to 94CDid a phase change occur? If so, which one? Is this endothermic or exothermic?4. Calculate the amount of energy absorbed when 5g ice @ OC melts to water @ 0C.Did a phase change occur? If so, which one? Is this endothermic or exothermic?5. Calculate the amount of energy given off when 13g of water at 51 C freezes to ice @ OCDid a phase change occur? If so, which one? Is this endothermic or exothermic?

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2. Calculate the amount of energy absorbed when 75g ice @ -4C melts to 31 C Did a phase change occur? If so, which one? Is this endothermic or exothermic?

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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Heating/Cooling Curve Calculations
1. Calculate the amount of energy given off when 17 g of vapor at 1002C condenses to 870
Did a phase change occur? If so, which one? Is this endothermic or exothermic?
energy=1066.92J
Uising Q=mxexAT 4
Q=amoutof energy Qmxex4T
C= ope cif ic heatcapacilywoter
T:Chonge in temperature(7o
m=maDS
9-17X94× (-15く)
2. Calculate the amount of energy absorbed when 75g ice @ -4C melts to 31 C
Did a phase change occur? If so, which one? Is this endothermic or exothermic?
3. Calculate the amount of energy absorbed when 42 g of water at 21C heats to 94C
Did a phase change occur? If so, which one? Is this endothermic or exothermic?
4. Calculate the amount of energy absorbed when 5g ice @ OC melts to water @ 0C.
Did a phase change occur? If so, which one? Is this endothermic or exothermic?
5. Calculate the amount of energy given off when 13g of water at 51 C freezes to ice @ OC
Did a phase change occur? If so, which one? Is this endothermic or exothermic?

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