Answer to Question #275336 in Physics for Babar

Question

1 a State one difference and one similarity between boiling and evaporation of water. [2]

b A glass of water is placed in direct sunlight during a hot summer’s day.

The temperature of the water increases.

i Describe the change in the motion of the molecules of water. [1]

ii Explain whether or not there is a change in the internal energy of the water. [3]

c Complete the table below for each of the processes shown. Use the symbol ‘+’ for

an increase, the symbol ‘–’ for a decrease and ‘0’ for no significant change, as appropriate. [3]

Kinetic energy

of the particles

Potential energy

of the particles

Internal energy

An aluminium block increasing

its temperature from room

temperature to 300 °C.

Water boiling at 100 °C and

changing into steam at 100 °C.

Water at 0 °C changing into ice

at –15 °C.

Answer 1

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