a.
Interpretation: To calculate the amount of heat required when the ice cube absorbs from the water when it melts.
Concept Introduction: The heat that is needed to raise the temperature by 1° of any
It can be expressed as follows:
a.
Answer to Problem 91A
The amount of heat required is
Explanation of Solution
The value for the heat of fusion is
The mass of ice is
Therefore, the amount of heat can be calculated as follows:
b.
Interpretation: To calculate the grams of water needed.
Concept Introduction: At constant pressure, the amount of heat that is released or absorbed is identical to the enthalpy change.
It can be expressed as follows:
Here,
b.
Answer to Problem 91A
The number of grams of water are
Explanation of Solution
The formula that is used to calculate the amount of heat absorbed or released can be expressed as follows:
Here,
The specific heat of liquid water is
The amount of heat required is
The change in temperature is given as:
Now, substitute the above values in equation (1) in order to calculate the amount of water in grams.
Thus, the mass of water in grams is
Chapter 17 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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