7. Consider a beaker of pure water and a swimming pool of pure water. Which of the following
statements are true about the water in each case and WHY?
I. They have the same heat capacity.
II. They have the same molar heat capacity.
III. They have the same specific heat capacity.
Solution
Molar heat capacity is heat capacity for 1 mol
So, this doesn’t depend on quantity of water present
So, Molar heat capacity will be same in both cases
specific heat capacity is heat capacity for 1 g
So, this doesn’t depend on quantity of water present
So, Molar heat capacity will be same in both cases
Heat capacity depends on the quantity of water
heat capacity = mass * specific heat capacity
So, the one with greater mass will have greater heat capacity
Answer: II and III are true