4. If 2000 J of heat is added to water at 100°C, causing it to boil without changing the temperature, what type of heat is involved?A. Sensible heatB . Thermal heatC. Specific heatC. Latent heat
Question
- If 2000 J of heat is added to water at 100°C, causing it to boil without changing the temperature, what type of heat is involved?A. Sensible heatB . Thermal heatC. Specific heatC. Latent heat
Solution
The type of heat involved when heat is added to water at its boiling point, causing it to boil without changing the temperature, is Latent heat.
Here's why:
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Sensible heat is the heat exchanged by a body or thermodynamic system in which the temperature of the body or system changes. In this case, the temperature of the water is not changing, so it's not sensible heat.
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Thermal heat is a general term that refers to the total kinetic energy of all particles in a system and is related to temperature. It doesn't specifically refer to the heat added to cause a phase change without a temperature change.
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Specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius. Again, in this case, the temperature is not changing, so it's not specific heat.
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Latent heat is the heat absorbed or released by a substance during a phase change from a gas to a liquid or a liquid to a solid while remaining at a constant temperature. In this case, the water is boiling, which is a phase change from a liquid to a gas at a constant temperature. So, the heat involved is latent heat.
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