Question

In which sample of water do the water particles have more energy : 5grams of ice cubes at -10 C, or 5 g of liquid water at 20 C? How do you know?

Answer 1

5 g of liquid water at 20 C because liquids have a higher kinetic energyand the temperature is higher than that of the ice cubes

Answer 2

Answer: 5 grams of liquid water at 20°C will have more energy.

Step-by-step explanation:

Kinetic energy is the measure of temperature of the system.

The equation used to calculate kinetic energy of a particle follows:

`E=(3)/(2)kT`

where,

E = kinetic energy of the particles

k = Boltzmann constant =
`1.38* 10^(-23)J/K`

T = temperature of the particle

From the above relation, it is visible that kinetic energy is directly related to the temperature of the system.

If the temperature of the particles is high, it means that the particles will have more energy.

We are given:

5 grams of ice cubes at -10°C

5 grams of liquid water at 20°C

So, the temperature of water particles is more than the temperature of ice cube.

Hence, 5 grams of liquid water at 20°C will have more energy.