Question

Statement 1: $320$ calories or $1.34\times {10}^3$ joules of heat will melt $4$ grams of ice at $0^o$C.
Statement 2: The heat of fusion of water is $80$ calories per gram or $3.34\times {10}^2$ joules per gram.

• A. Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.
• B. Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.
• C. Statement 1 is correct but Statement 2 is not correct.
• D. Statement 1 is not correct but Statement 2 is correct.
• E. Both the Statement 1 and Statement 2 are not correct.

Answer 1

The correct option is A

Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

Statement 1: 320 calories or 1.34×103 joules of heat will melt 4 grams of ice at 0oC.
Statement 2: The heat of fusion of water is 80 calories per gram or 3.34×102 joules per gram.
Melting of 1 g of ice will require $3.34\times {10}^2$ joules.
Melting of 1 g of ice will require $4\times 80=320$ calories.
Melting of 1 g of ice will require 80 calories.
Melting of 1 g of ice will require $4\times 3.34\times {10}^2=1.34\times {10}^3$ joules.
Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.