Question

On suffering from high fever, which will lower your body temperature more; ice or ice cold water ?

Answer 1

• Ice will lower the body temperature more than ice cold water because latent heat of fusion of ice is quite high (335 kJ kg^-1). therefore, Ice is expected to absorb more heat energy from the body and will lower the body temperature more than ice cold water.
• Latent heat of fusion, also known as enthalpy of fusion, is the amount of energy that must be supplied to a solid substance (typically in the form of heat) in order to trigger a change in its physical state and convert it into a liquid (when the pressure of the environment is kept constant).
• For example, the latent heat of fusion of one kilogram of water, which is the amount of heat energy that must be supplied to convert 1 kg of ice without changing the temperature of the environment (which is kept at zero degrees Celsius) is 333.55 kilojoules.