Related Practice Questions :

One kilogram of ice at 0°C is mixed with one kilogram of water at 80°C. The final tem perature of the mixture is (Take Specific heat of water 4200 Jkg1 k-1, Latent heat of ice 336 kJ kg) (A) 0°C (C) 40°C (B) 50°C (D) 60°C

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80 g of water at 30°C is poured on a large of ice at 0°C. The mass of ice that melts is -

1.  15 g

2.  30 g

3.  50 g

4  60 g

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Heat capacity is equal to the product of:

1.  mass and gas constant

2.  mass and specific heat

3.  latent heat and volume of water

4.  mass and Avogadro number

 

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A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is [Latent heat of ice is 3.4x105J/Kg and g=10N/Kg]

(a) 544 km
(b) 136 km
(c)  68  km
(d)  34 km

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Steam at 100°C is passed into 20 g of water at 10°C. When water acquires a temperature of 80°C, the mass of water present will be (Take specific heat of water=1 cal g-1 °C-1 and latent heat of steam = 540 cal g-1)

(a) 24 g                       

(b) 31.5g

(c) 42.5 g                   

(d) 22.5 g

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