Question

Which of the following substance have greater average kinetic energy of its molecules at 10°C?
Mercury
Water
Copper
steel​

Answer 1

Answer:

Ans: At 10°C water molecules have greater kinetic energy. Due to lesser intermolecular forces as compared to steel, copper and mercury.

Answer 2

Answer:

Water has a greater average kinetic energy of its molecules at 10°C.

Explanation:

• Water molecules have more kinetic energy at 10 °C. because the intermolecular forces in water are weaker than in metals like steel, copper, and mercury.
• Stronger intermolecular forces exist in solids. To move its molecule, it, therefore, expends a lot of energy. Compared to solids, liquids have fewer intermolecular forces. So, moving molecules requires less energy. However, gas is least necessary due to the lowest interstellar forces.
• Copper and steel are thus both solid materials. They cannot have more energy on average.
• These days, mercury is denser than water. Thus, the intermolecular forces in water are weaker. Consequently, water molecules will have a higher average kinetic energy.

Thus, Water has a greater average kinetic energy of its molecules at 10°C.

#SPJ2