3. How much heat is absorbed when 63.7g of H,0 (I) at 100°C and101.3kPa is converted to H,0 (g) at 100°C? Express your answer inKj. 6. How much heat must be removed to freeze a tray of ice cubes at0°C if the water has a mass of 225 g?7. How many kilojoules of heat are required to vaporize 50.0 g ofethanol, C2H,0? The boiling point of ethanol is 78.3°C. Its molarheat of vaporization is 38.6 kJ/mol.8. How many kilojoules of heat are released when 25.0 g of NaOH (s)is dissolved in water?

To convert 1 mol of water to steam we required 40.7KJ of energy . to convert 63.7 gram of water we…

Answered: How much heat is absorbed when 63.7g of…

How much heat is absorbed when 63.7g of H2O (I) at 100°C and 101.3 kPa is converted to H20 (g) at 100°C? Express your answer in Kj.

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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Concept explainers

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.

Question

3. How much heat is absorbed when 63.7g of H,0 (I) at 100°C and
101.3kPa is converted to H,0 (g) at 100°C? Express your answer in
Kj.

6. How much heat must be removed to freeze a tray of ice cubes at
0°C if the water has a mass of 225 g?
7. How many kilojoules of heat are required to vaporize 50.0 g of
ethanol, C2H,0? The boiling point of ethanol is 78.3°C. Its molar
heat of vaporization is 38.6 kJ/mol.
8. How many kilojoules of heat are released when 25.0 g of NaOH (s)
is dissolved in water?

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