(a)
Interpretation:
The quantity of heat lost or gained is to be calculated.
Concept Introduction :
The molar heat of solidification or freezing of a substance is the heat released by one mole of that substance as it is converted from a liquid state to a solid state. The negative sign of heat represents an exothermic reaction, which means heat is released during the reaction.
(a)
Answer to Problem 62A
The quantity of heat lost is
Explanation of Solution
Molar heat of freezing of water at
Thus, to freeze
To freeze
(b)
Interpretation:
The quantity of heat lost or gained is to be calculated.
Concept Introduction :
The molar heat of condensation of a substance is the heat released by one mole of that substance as it is converted from a gaseous state to a liquid state. The negative sign of heat represents an exothermic reaction, which means heat is released during the reaction.
(b)
Answer to Problem 62A
The quantity of heat lost is
Explanation of Solution
Molar heat of condensation of steam at
Thus, to condense
To freeze
(c)
Interpretation:
The quantity of heat lost or gained is to be calculated.
Concept Introduction :
The molar heat of the solution of a substance is the heat absorbed or released when one mole of the substance is dissolved in water. The negative sign of heat represents an exothermic reaction, which means heat is released during the reaction.
(c)
Answer to Problem 62A
The quantity of heat lost is
Explanation of Solution
Molar heat of solution of
Thus, to dissolve
To dissolve
(d)
Interpretation:
The quantity of heat lost or gained is to be calculated.
Concept Introduction:
The molar heat of the vaporization of a substance is the heat released by one mole of that substance as it is converted from a liquid state to a gaseous state. A positive sign of heat represents an endothermic reaction, which means heat is absorbed during the reaction.
(d)
Answer to Problem 62A
The quantity of heat gained is
Explanation of Solution
Molar heat of vaporization of ethanol
Thus, to vaporize
To dissolve
Chapter 17 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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