Question

8) Which one of the following statements best describes why large amounts of heat are required to raise the temperature of water. Large amounts of heat are required to break the covalent bonds between water molecules so that increased motion of the water molecules can be measured as an increase in water temperature Large amounts of heat are required to break the hydrogen bonds between water molecules so that increased motion of the water molecules can be measured as an increase in water temperature Large amounts of heat are required to break the polar covalent bonds of the water molecules which releases large amounts of heat to the water which is measured as an increase in water temperature. As heat is added to water, over long periods of time the water molecules form ionic bonds with other elements (e.g. sodium). This results in increased motion of the water molecules which is measured as a gradual increase in temperature.

Answer 1

B. water molecules form hydrogen bonds amongst themselves. Thus, when heating water some amount of heat energy is required to break the hydrogen bonds.

Thus water has a high specific heat capacity. ie.e the amount of heat required to rise the temperature of 1gm of the substance by 1degree