Question

$80g$ of water at $30^{\circ }C$ are poured on a large block of ice at $0^{\circ }C.$ The mass of ice that melts is:-

• A. $30g$
• B. $80g$
• C. $1600g$
• D. $150g$

Answer 1

Answer: (A)

$ms\Delta \theta =m^{{}^{\prime }}L$
$80\times 1\times \left(30-0\right)=m^{{}^{\prime }}\times 80$
$m^{{}^{\prime }}=30g$