question_answer

Ice at  \[-20{}^\circ C\] is added to 50 g of water at \[40{}^\circ C\]. When the temperature of the mixture reaches \[0{}^\circ C\], it is found that 20 g of ice is still unmelted. The amount (in gram) of ice added to the water was (Specific heat of water \[=4.2J/g/{}^\circ C\] Specific heat of Ice \[=2.1\text{ }J/g/{}^\circ C\] Heat of fusion of water at \[0{}^\circ C=334J/g\]

Answer:

40.1