Chapter 12, Problem 64A

To determine

The liquidwhich would cool faster.

Answer to Problem 64A

Methanol

Explanation of Solution

Introduction:

Thermal energy can be obtained by:

  $Q=mc\Delta T$

Where, m is the mass, c is the specific heat capacity and $\Delta T$ is the difference in temperature.

Specific heat refers to the amount of energy required to raise the temperature of unit mass by one unit of temperature.

Specific heat capacity of water is, $c_w=4.184\text{J/g}\cdot \text{°C}$

Specific heat capacity of methanol, $c_m=2.12\text{J/g}\cdot \text{°C}$

As the specific heat capacity of methanol is lower than that of water, methanol will cool faster than water.