1. How much energy is absorbed when 25.0 g of ice at water at 0.0°C? The heat of fusion of ice is 80 cal/g. 2. How much energy is absorbed when the water at 0.0°C in Question 1 is heated to 100.0°C? The specific heat of water is 1.0 cal/g.°C. 3. How much energy is absorbed when the water at 100.0°C in Question 2 vaporizes to 100.0°C? The heat of vaporization of water is 540 cal/g.

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Chapter1: Units, Trigonometry. And Vectors
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## Energy Absorption and Phase Change Problems

On a separate sheet of paper, solve the following problems. Note that the quantity of heat energy required to change the phase of a substance is given by the following equation: \( Q = mL \), where \( Q \) is the heat required, \( m \) is the mass, and \( L \) is the heat of fusion or vaporization.

### Questions

1. **Melting Ice**
   - How much energy is absorbed when 25.0 g of ice at 0.0°C melts to form water at 0.0°C? 
   - The heat of fusion of ice is 80 cal/g.

2. **Heating Water**
   - How much energy is absorbed when the water at 0.0°C in Question 1 is heated to 100.0°C?
   - The specific heat of water is 1.0 cal/g·°C.

3. **Vaporizing Water**
   - How much energy is absorbed when the water at 100.0°C in Question 2 vaporizes to 100.0°C?
   - The heat of vaporization of water is 540 cal/g.

4. **Condensing Steam**
   - The steam in Question 3 is used to melt ice. How much ice will be melted by the energy released by the condensation of the steam at 100.0°C?
Transcribed Image Text:## Energy Absorption and Phase Change Problems On a separate sheet of paper, solve the following problems. Note that the quantity of heat energy required to change the phase of a substance is given by the following equation: \( Q = mL \), where \( Q \) is the heat required, \( m \) is the mass, and \( L \) is the heat of fusion or vaporization. ### Questions 1. **Melting Ice** - How much energy is absorbed when 25.0 g of ice at 0.0°C melts to form water at 0.0°C? - The heat of fusion of ice is 80 cal/g. 2. **Heating Water** - How much energy is absorbed when the water at 0.0°C in Question 1 is heated to 100.0°C? - The specific heat of water is 1.0 cal/g·°C. 3. **Vaporizing Water** - How much energy is absorbed when the water at 100.0°C in Question 2 vaporizes to 100.0°C? - The heat of vaporization of water is 540 cal/g. 4. **Condensing Steam** - The steam in Question 3 is used to melt ice. How much ice will be melted by the energy released by the condensation of the steam at 100.0°C?
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