Thermal Properties

Which of the following substances have greater average kinetic energy of its molecules at 10 degree Celsius ? (a) steel (b) copper (c) water (d) mercury

Solutions

Expert Solution

Solid has stronger intermoleculer forces. So, it requires a lot of energy to move its molecule. Liquid has weaker intermolecular forces than solid. So, it need less energy to move molecules. whereas gas need least because of weakest intermoecluar forces.

So, steel and copper are solid. their average energy can't be greater.

Now mercury is more denser than water. So, water has weaker intermoelcular forces. So, average kinetic energy of water molecules will be greater.

Water has greater kinetic energy

Sadaf Mukhtar answered 2 years ago

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