Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 27

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Heat given to a body which raises its temperature by $1 ° C$ is,

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Important Questions on Thermal Properties of Matter

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 28

A block of ice at

- 10 ° C

is slowly heated and converted to steam at

100 ° C

. Which of the following curves represent the phenomenon qualitatively?

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 29

540 g

of ice at

0 ° C

is mixed with

540 g

of water at

80 ° C

. The final temperature of the mixture is _____

° C

.

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 30

The thermal capacity of any body is:

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 31

Figure shows the pressure - temperature phase diagram for water, the curves corresponding to sublimation, fusion and vaporisation respectively are

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 32

An electric kettle takes

4 A

current at

220 V

. How much time will it take to boil

1 kg

of water from temperature

20 ° C ?

The temperature of boiling water is

100 ° C

.

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 33

Time taken by a

836 W

heater to heat one litre of water from

10 ° C

to

40 ° C

is

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 34

2 liters

water at

27 ° C

is heated by a

1 kW

heater in an open container. On average heat is lost to surroundings at the rate

160 J s^{- 1}

. The time required for the temperature to reach

77 ° C

is (The specific heat of water

4.2 J g^{- 1} ° C^{- 1}

)

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Alpha Question Bank for Medical: Physics>Chapter 15 - Thermal Properties of Matter>Exercise-1>Q 35

A piece of ice (heat capacity

= 2100 J {kg}^{- 1} {{}^{\circ}C}^{- 1}

and latent heat

= 3.36 \times 10^{5} J {kg}^{- 1}

) of mass

m

grams is at

- 5 ° C

at atmospheric pressure. It is given

420 J

of heat so that the ice starts melting. Finally when the ice-water mixture is in equilibrium, it is found that

1 gm

of ice has melted. Assuming there is no other heat exchange in the process, the value of

m

is :