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Latent heat of ice 80 cal/gm . A man mel...

Latent heat of ice 80 cal/gm . A man melts 60 g of ice by chewing in 1 minute . His power is

A

4800 W

B

336 W

C

1.33 W

D

0.75 W

Text Solution

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The correct Answer is:
B
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Latent heat of ice is 80 calgm. A man meits 60 gm of ice by chewing in 1 minute. His power is

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1 g of steam at 100^@C and an equal mass of ice at 0^@C are mixed. The temperature of the mixture in steady state will be (latent heat of steam =540 cal//g , latent heat of ice =80 cal//g ,specific heat of water =1 cal//g^@C )

10 gm of ice at – 20^(@)C is added to 10 gm of water at 50^(@)C . Specific heat of water = 1 cal//g–.^(@)C , specific heat of ice = 0.5 cal//gm-.^(@)C . Latent heat of ice = 80 cal/gm. Then resulting temperature is -

When a man does exercise on a treadmill machine, work doen by him is supplied in the form of heat of an ice bath. Find how much he has to do to convert a piece of 5 gm of ice at -3^(@)C to steam at 100^(@)C .Given that the specific heat of ice is 0.5 cal/ gm^(@)C , latent heat of fusion of ice is 80 cal/gm and laten heat of vaporization of water is 540 cal/gm.

150 g of ice is mixed with 100 g of water at temperature 80^(@)C . The latent heat of ice is 80 cal/g and the specific heat of water is 1 cal//g-.^(@)C . Assuming no heat loss to the environment, the amount of ice which does not melt is –

A heater melts 0^@C ice in a bucket completely into water in 6 minutes and then evaporates all that water into steam in 47 minutes 30 sec . If latent heat of fusion of ice is 80 cal//gram , latent heat of steam will be (specific heat of water is 1 cal//gam-^@C )

AAKASH INSTITUTE-THERMAL PROPERTIES OF MATTER-Assignment (Section-A) Objective Type questions (one option is correct)
  1. The portion of the curve representing the state of matter denotes

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  2. Water falls from a height 500 m. what is the rise in temperature of wa...

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  3. Latent heat of ice 80 cal/gm . A man melts 60 g of ice by chewing in 1...

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  4. There indectical thermal conductors are connected as shown in Fig. 7(C...

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  5. Consider a compound slab consisting of two different material having e...

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  6. The outer faces of a rectangular slab made of equal thickness of iron ...

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  7. The dimensions of thermal resistance are

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  8. The temperature of water at the surface of a deep lake is 2^@C. The te...

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  9. A body of length 1 m having cross sectional area 0.75 m^(2) has heat f...

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  10. A cylinderical rod has temperature T(1) and T(2) at its ends. The rate...

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  11. A slab consists of two parallel layers of two different materials of s...

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  12. The layers of atmosphere are heated through

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  13. The temperature gradient in a rod of 0.5 m long is 80^(@)C//m. If the ...

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  14. The ratio of thermal conductivity of two rods of different material is...

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  15. Five rods of same dimensions are arranged as shown in the figure. They...

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  16. In heat transfer, which method is based on gravitation

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  17. The process in which rate of transfer of heat maximum is .

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  18. Good absorbers of heat are

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  19. A body, which emits radiations of all possible wavelengths, is known a...

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  20. A hot and a cold body are kept in vacuum separated from each other. Wh...

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