Question

Give one example where high specific heat capacity of water is used as heat reservoir.

• A. water remains hot in the bottle for a long time
• B. water remains cold in the bottle for a long time
• C. water remains hot in the bottle for some time
• D. none of these

Answer 1

The correct option is A water remains hot in the bottle for a long time

Water has the highest specific heat capacity therefore it takes a long time to heat and long time to cool. This is the reason why hot water bottles are used for fomentation, as the water remains hot in the bottle for a long time in spite of giving off large quantities of heat.
Hence, in fomentation, water is used as heat reservoir.