Question

Which require more heat : $1g$ ice at $0^o$C or $1g$ water at $0^o$C to raise its temperature to ${10}^o$C?

• A. $1g$ ice at 0${}^o$C
• B. $1g$ water at 0${}^o$C
• C. both need same heat
• D. none of the above

Answer 1

The correct option is A $1g$ ice at 0${}^o$C

Answer is A

heat require by water = $1\times 4.2\times 10=42J$

heat require by ice= $1\times 336+1\times 4.2\times 10=378J$

ice requires more heat.