The following information is given for bismuth at
A
Interpretation:
The amount of energy released by the temperature of liquid bismuth is changed from
Concept introduction:
The amount of energy required to change the state of a substance is known as enthalpy. It is the different in the energy of final and initial state of a substance. The negative and positive sign of enthalpy indicates the energy released and energy absorbed, respectively, during the phase change.
Answer to Problem 98E
The amount of energy released by the temperature of liquid bismuth is changed from
Explanation of Solution
Bismuth solidifies at
The amount of energy released when temperature changes from
Where,
•
•
•
•
The specific heat of bismuth is
Substitute the mass, final, initial temperature and specific heat of zinc in equation (1).
The amount of energy required for phase transformation is calculated by the formula shown below.
Where,
•
The heat of fusion of bismuth is
Substitute the mass and heat of fusion in equation (2).
The amount of energy required to change the temperature of bismuth from
Where,
•
•
•
•
The specific heat of bismuth is
Substitute the mass, final, initial temperature and specific heat of bismuth in equation (3).
The amount of energy released by the temperature of liquid bismuth is changed from
Convert
The amount of energy released by the temperature of liquid bismuth is changed from
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Chapter 15 Solutions
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