Question

A block of ice of mass $120\, g$ at temperature $0^{\circ} C$ is put in $300\, gm$ of water at $25^{\circ} C$ The $xg$ of ice melts as the temperature of the water reaches $0^{\circ} C$ The value of $x$ is [Use: Specific heat capacity of water $=4200\,Jkg ^{-1} K ^{-1}$, Latent heat of ice = 3.5 $\times$ 105 JKg-1]

Answer 1

The correct answer is 90
Energy released by water =0.3×25×4200=31500J
let mkg ice melts
m×3.5×105=31500
m=3.531500×10−5​=9000×10−5
m=0.09kg=90gm
x=90