question_answer

30 g of water at \[300{}^\circ C\] is in a beaker. Which of the following, when added to water, will have greatest cooling effect? (Specific heat of copper \[=\text{ }0.1\text{ }cal/\text{ }g{}^\circ \text{ }C\])

A)  100 g of water at \[10{}^\circ C\]

B)  15 g of water at \[0{}^\circ C\]

C)  3 g of ice at \[0{}^\circ C\]

D)  18 g of copper at \[0{}^\circ C\]