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Standard VIII

Chemistry

Specific Heat

A 600 g piece...

Question

A 600 g piece of granite, heated to $560 ° C$ in a campfire, is dropped into 1 liter water at $25.0 ° C$ . Calculate the final temperature of the granite. The specific heat capacity of water is $s_{w} = 1 c a l / g ° C$ , and the specific heat of granite is $s_{g} = 0.2 c a l / g ° C$ .

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Q. A refrigerator converts

100 g

of water at

25^{\circ} C

into ice at

- 10^{\circ} C

1 h

and

50 m i n

. The quantity of heat (in calorie) removed per min is (specific heat of ice

s_{i c e} = 0.5 c a l / g^{\circ} C

, specific heat of water

s_{w} = 1 c a l / g^{\circ} C

latent heat of fusion

= 80 c a l / g

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Q. A piece of ice of mass

50 g

exists at a temperature of

- 20^{\circ} C

. Determine the total heat required to convert it completely to steam at

100^{\circ} C

. (Specific heat capacity of ice

= 0.5 c a l / g^{\circ} C

; specific latent heat of fusion for ice

= 80 c a l / g

and specific latent heat of vapourisation for water

= 540 c a l / g

)

Q. Four cubes of ice at

- 10^{\circ} C

, each of one gram, is taken out from a refrigerator and dropped into

150 g

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, specific heat capacity of ice

= 0.5 cal/g^{\circ} C

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)

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A 600 g piece of granite, heated to 560°C in a campfire, is dropped into 1 liter water at 25.0°C. Calculate the final temperature of the granite. The specific heat capacity of water is sw=1 cal/g°C, and the specific heat of granite is sg=0.2 cal/g°C.

A 600 g piece of granite, heated to $560 ° C$ in a campfire, is dropped into 1 liter water at $25.0 ° C$ . Calculate the final temperature of the granite. The specific heat capacity of water is $s_{w} = 1 c a l / g ° C$ , and the specific heat of granite is $s_{g} = 0.2 c a l / g ° C$ .