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Rubbing your hands together on a cold day increases their internal energy.
The larger the amount of material, the more energy is needed to heat it up.
Specific heat capacity is defined as the energy required to raise the temperature of 1 kg of a substance by 1 °C.
The specific heat capacity of water is 4200 J/kg°C.
It takes 190 J of energy to raise the temperature of 1 kg of lead by 1 °C.
Melting and boiling involve a change in temperature as energy is supplied to the substance.
Pure ice melts at 0 °C and pure water boils at 100 °C at standard atmospheric pressure.
The melting point is the temperature at which a substance changes from a liquid to a gas.
Condensation is the process of a substance changing from a gas to a liquid.
Evaporation causes the temperature of the remaining liquid to increase.