HEAT CALCULATIONS: Problem Set A. (SHOW ALL WORK) 1. How many kilojoules are required to melt a 500. gram ice cube? 2. What is the total number of joules of heat energy absorbed when the temperature of 200. grams of water is raised from 10.0°C to 40.0°C? What is your answer expressed in kilojoules? 3. How much heat is required to completely boil a 50.0 gram sample of water that is at its normal boiling point? 4. Once boiled, how much heat is required to raise the temperature of the gas in the previous problem from 100.°C to 140.°C? (The specific heat for H₂O(g) = 1.84 J/g C) 5. How much heat is required to melt a 50.0 gram ice cube that is at its normal melting point? 6. Once melted, how much heat is required to raise the temperature of the puddle in the previous question from 0.0°C to 40.0°C
HEAT CALCULATIONS: Problem Set A. (SHOW ALL WORK) 1. How many kilojoules are required to melt a 500. gram ice cube? 2. What is the total number of joules of heat energy absorbed when the temperature of 200. grams of water is raised from 10.0°C to 40.0°C? What is your answer expressed in kilojoules? 3. How much heat is required to completely boil a 50.0 gram sample of water that is at its normal boiling point? 4. Once boiled, how much heat is required to raise the temperature of the gas in the previous problem from 100.°C to 140.°C? (The specific heat for H₂O(g) = 1.84 J/g C) 5. How much heat is required to melt a 50.0 gram ice cube that is at its normal melting point? 6. Once melted, how much heat is required to raise the temperature of the puddle in the previous question from 0.0°C to 40.0°C
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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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.
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HEAT CALCULATIONS: Problem Set A. (SHOW ALL WORK)
1. How many kilojoules are required to melt a 500. gram ice cube?
b Homework He X
2. What is the total number of joules of heat energy absorbed when the temperature of
200. grams of water is raised from 10.0°C to 40.0°C? What is your answer expressed
in kilojoules?
3. How much heat is required to completely boil a 50.0 gram sample of water that is at
its normal boiling point?
4. Once boiled, how much heat is required to raise the temperature of the gas in the
previous problem from 100.°C to 140.°C? (The specific heat for H₂O(g) = 1.84 J/g C)
5. How much heat is required to melt a 50.0 gram ice cube that is at its normal melting
point?
a
6. Once melted, how much heat is required to raise the temperature of the puddle in the
previous question from 0.0°C to 40.0°C?
+
33°F
C
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