Question

E 6.52

Part A
7 of 2
Consider two glasses, one filled with water and the other half-full, both at the same temperature. In which glass are the water molecules moving faster? In
which is there greater thermal energy? In which will more heat be required to increase the temperature by 1°C?

Answer 1

The water molecules in the half-full glass are moving faster and have greater thermal energy than in the glass filled with water. More heat is required to increase the temperature of the half-full glass by 1°C.

Step-by-step explanation:

The water molecules in the glass that is half-full will be moving faster than the ones in the glass that is filled completely with water. This is because the glass that is half-full has more empty space for the water molecules to move around, resulting in faster movement.

The glass that is half-full also has greater thermal energy. This is because the thermal energy of a substance is directly related to its temperature and the kinetic energy of its particles. Since the water molecules in the half-full glass are moving faster, they have more kinetic energy and therefore, greater thermal energy.

More heat will be required to increase the temperature of the glass with less water (half-full glass) by 1°C. This is because the glass with less water has fewer water molecules to absorb and distribute the heat, compared to the glass that is completely filled with water.

Learn more about Thermal energy and molecular movement