Question

Boiling water is changed into steam the specific heat of the boiling water is

Answer 1

When boiling water at 100C changes to steam at 100C, the process is known as vaporization. The heat of vaporization (or enthalpy of vaporization) for water is 2257J/g or 40.660kJ/mol

Answer 2

Answer: The correct answer is infinity.

Explanation:

Specific heat: It is heat required to raise the temperature of the unit mass of the given substance by one degree Celsius.

The expression of the specific heat in terms of temperature is as follows;

$Q=mc\Delta T$

Here, Q is the heat, m is the mass of the substance and $\Delta T$ is the change in the temperature.

Rearrange the expression for c.

$c= \frac{Q}{m\Delta T}$

The specific heat water is 4.8 joule per gram degree Celsius. When water changes into steam during boiling, the temperature remains constant as the energy is spent in changing the state of the matter not in increasing the temperature. It is called latent heat.

Put $\Delta T= 0$ in the above expression.

$c= \frac{Q}{m(0)}$

$c=infinity$

Therefore, the specific heat of the boiling water is infinity.