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When a material changes temperature, it absorbs or releases sensible heat. The amount of heat depends on the mass, material, and temperature change (Q = mc∆T).
- Practice
When a material changes temperature, it absorbs or releases...
- Practice
Problem (5): The temperature of a sample of water increases from 20°C to 46.6°C as it absorbs 5650 calories of heat. What is the mass of the sample? (Specific heat of water is 1.0 cal/g.°C)
When a material changes temperature, it absorbs or releases sensible heat. The amount of heat depends on the mass, material, and temperature change (Q = mc∆T).
Definition. Sensible heat is the amount of thermal energy that causes a change in temperature of a substance without changing its phase. This concept is crucial in understanding how refrigerators and heat pumps operate, as they rely on transferring sensible heat from one location to another to achieve desired temperature changes.
Why is the heat energy used to overcome the intermolecular force only when it reaches melting point or boiling point?
Sensible heat is calculated using the equation: Q = m * c * ΔT, where Q is the heat added or removed, m is the mass, c is the specific heat capacity, and ΔT is the temperature change. In heating and cooling processes, sensible heat plays a vital role in determining how much energy is needed to achieve the desired temperature change.
Sensible heat is literally the heat that can be felt. It is the energy moving from one system to another that changes the temperature rather than changing its phase. For example, it warms water rather than melting ice.
