Latent Heat
Easyphysics
Heat to convert 0.5 kg of ice at 0°C to water at 0°C (L_f = 3.3×10⁺5 J/kg)?
Select the correct option:
Solution
Incorrect! Answer:
- Latent Heat Link: During a phase change (like melting), heat is absorbed without a change in temperature.
- Formula: Q=mLf, where m is mass and Lf is latent heat of fusion.
- Variables:
- m=0.5 kg
- Lf=3.3×105 J/kg
- Calculation:
- Q=0.5×3.3×105
- Q=1.65×105 J.
- Result: 1.65×105 J is required.
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About This Question
- Subject
- physics
- Chapter
- thermodynamics
- Topic
- latent heat
- Difficulty
- Easy
- Year
- 2025
Solution
- Latent Heat Link: During a phase change (like melting), heat is absorbed without a change in temperature.
- Formula: Q=mLf, where m is mass and Lf is latent heat of fusion.
- Variables:
- m=0.5 kg
- Lf=3.3×105 J/kg
- Calculation:
- Q=0.5×3.3×105
- Q=1.65×105 J.
- Result: 1.65×105 J is required.
This easy difficulty physics question is from the chapter thermodynamics, covering the topic of latent heat. It appeared in the 2025 exam.
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