A refrigerator converts 100 g of water at 10° C into ice at 0° C in one hour. What will be the quantity of heat removed per minute? Take the specific heat of water is cal g -1 ° C -1 and latent heat of ice =80 cal g -1

Question

A refrigerator converts 100 g of water at 10° C into ice at 0° C in one hour. What will be the quantity of heat removed per minute? Take the specific heat of water is cal g -1 ° C -1 and latent heat of ice =80 cal g -1 (A) 150 cal min -1 (B) 200 cal min -1 (C) 250 cal min -1 (D) 300 cal min -1

Tardigrade Admin · Accepted Answer

Heat drawn in cooling from 10° C to 0° C Δ Q1=m s Δ L=1 × 100 × 10=1000 cal Heat drawn in converting 100 gram water at 0° C to ice at 0° C Δ Q 2= mL =100 × 80=8000 cal Net quantity of heat removed =8000+1000=9000 ( text Heat removed / text minute )=(9000/60) =150 cal min -1

Q. A refrigerator converts $100 g$ of water at $1 0^{\circ} C$ into ice at $0^{\circ} C$ in one hour. What will be the quantity of heat removed per minute? Take the specific heat of water is cal $g^{- 1}^{\circ} C^{- 1}$ and latent heat of ice $= 80$ cal $g^{- 1}$

150 cal $min^{- 1}$

200 cal $min^{- 1}$

250 cal $min^{- 1}$

300 cal $min^{- 1}$

Q. A refrigerator converts 100g of water at 10∘C into ice at 0∘C in one hour. What will be the quantity of heat removed per minute? Take the specific heat of water is cal g−1∘C−1 and latent heat of ice =80 cal g−1

150 cal min−1

200 cal min−1

250 cal min−1

300 cal min−1

Heat drawn in cooling from 10∘C to 0∘C ΔQ1​=msΔL=1×100×10=1000 cal Heat drawn in converting 100 gram water at 0∘C to ice at 0∘C ΔQ2​=mL=100×80=8000cal Net quantity of heat removed =8000+1000=9000 minute Heat removed ​=609000​ =150 cal min−1

Q. A refrigerator converts $100 g$ of water at $1 0^{\circ} C$ into ice at $0^{\circ} C$ in one hour. What will be the quantity of heat removed per minute? Take the specific heat of water is cal $g^{- 1}^{\circ} C^{- 1}$ and latent heat of ice $= 80$ cal $g^{- 1}$

150 cal $min^{- 1}$

200 cal $min^{- 1}$

250 cal $min^{- 1}$

300 cal $min^{- 1}$