when calculating the heat given when water is changing to steam, do we use the specific latent heat of water or steam?
when calculating the heat given when water is changing to steam, do we use the specific latent heat of water or steam?
The energy supplied during the period when the temperature was constant is called latent heat.
Latent heat is the 'hidden heat' used to change the state of a substance without a change in temperature.
Latent heat means ‘hidden’ or concealed energy, in the sense that it does not show up on a thermometer.
Usually, when a substance is heated, its temperature rises. However, when matter changes phase from solid to liquid, or liquid to gas, there is no actual temperature rise. The energy is used to overcome the forces of attraction, which hold the H20 molecules together in the solid state (ice) so that they become relatively free to move. Similarly, energy is required to change water into water vapour. Specific latent heat is the quantity of energy required to change the state of 1 kg of a substance. The specific latent heat of vaporisation of water is the amount of heat required to change 1 kg of water to steam without a change in temperature.
The specific latent heat of vaporisation of water is 2.26 MJ kg –1.
The energy supplied during the period when the temperature was constant is called latent heat.
Latent heat is the 'hidden heat' used to change the state of a substance without a change in temperature.
Latent heat means ‘hidden’ or concealed energy, in the sense that it does not show up on a thermometer.
Usually, when a substance is heated, its temperature rises. However, when matter changes phase from solid to liquid, or liquid to gas, there is no actual temperature rise. The energy is used to overcome the forces of attraction, which hold the H20 molecules together in the solid state (ice) so that they become relatively free to move. Similarly, energy is required to change water into water vapour. Specific latent heat is the quantity of energy required to change the state of 1 kg of a substance. The specific latent heat of vaporisation of water is the amount of heat required to change 1 kg of water to steam without a change in temperature.
The specific latent heat of vaporisation of water is 2.26 MJ kg –1.
