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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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
Transcribed Image Text:**Question:** How much energy would be needed to melt 25 grams of ice at 0°C to water at 0°C? Give your answer in calories to the nearest whole unit.
---
**Explanation:**
In this question, you are asked to calculate the energy required to melt ice into water, both at the same temperature (0°C). This process involves the concept of latent heat of fusion. The latent heat of fusion of ice is 79.72 calories per gram. To find the total energy needed, you multiply the mass of the ice (in grams) by the latent heat of fusion.
**Calculation:**
Energy (calories) = mass (grams) × latent heat of fusion (calories/gram)
Energy = 25 grams × 79.72 calories/gram
Therefore, you need to multiply and then round your answer to the nearest whole unit to find the amount of energy required in calories.
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