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Sagot :
A solid block of metal is at its melting temperature. It takes 24j to melt 6kg of metal. What is the latent heat of fusion of the metal?
What is Latent Heat of Fusion?
Enthalpy of fusion, also known as (latent) heat of fusion, is the change in enthalpy that takes place when energy, typically heat, is provided to a specific quantity of a substance to cause it to change from a solid to a liquid at constant pressure.
For instance, 1 kilogram of ice melts at 0 °C at a variety of pressures, absorbing 333.55 kJ of energy without causing a change in temperature.
The heat of solidification, which occurs when a substance changes from a liquid to a solid, is equal and opposing.
This energy includes the contribution necessary to displace its surroundings against ambient pressure in order to accommodate any corresponding change in volume.
The melting point or the freezing point, depending on the situation, is the temperature at which the phase transition takes place. Conventionally, unless otherwise stated, the pressure is taken to be 1 atm (101.325 kPa).
Calculation
The formula of latent heat of fusion L= q/m where q is the heat provided and m is the mass of the object.
So, L = 24j/6kg
L= 4j/kg
So, the latent heat of fusion is 4 j/kg
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