Chapter 24, Problem 33A

Maria vigorously shakes a can of liquid back and forth for more than a minute. Does the temperature of the liquid increase? Why or why not? (Try it and see.)

To determine

To Explain: The changes in temperature of the liquid when person M shakes it back and forth for a minute.

Explanation of Solution

Introduction:

A body is cold or hot is expressed by the physical term temperature. A body is considered hot if its temperature is greater than the surrounding temperature and it is considered cold if the temperature is less than the surrounding temperature. The temperature of a body depends on the various physical parameters like heat, pressure and kinetic energy of molecules.

By the kinetic molecular theory,

  $KE=\frac{3RT}{2N_A}$

Or,

  $v_{rms}\propto \sqrt{T}$

By the formula, it is clear that the temperature of the liquid will increase when the kinetic energy or root mean square speed of the liquid molecules will increase but the temperature difference is very small so the difference is not noticeable.

Conclusion:

Hence, the temperature of the liquid will increase.