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Byju's Answer

Standard XII

Physics

Surface Energy

Consider the ...

Question

Consider the following statements.
$1.$ Steam at $100^{\circ} C$ and boiling water at $100^{\circ} C$ contain same amount of heat.
$2.$ Latent heat of fusion of ice is equal to the latent heat of vaporisation of water.
$3.$ Conditioner heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/ are correct?

1

and

2

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2

and

3

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Only

2

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Only

3

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Solution

The correct option is C Only $3$
Steam at $100^{o} C$ has more amount heat than boiling water at the same temperature.
Latent heat of fusion of ice is less than latent heat of vaporisation of water.
Thus statements 1 and 2 are incorrect but statement 3 is correct.

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Similar questions

400 g

of ice at 253 K is mixed with

0.05 k g

of steam at

100^{\circ} C

. Latent heat of vaporisation of steam is equal to 540 cal

g^{- 1}

. Latent heat of fusion of ice is equal to 80 cal

g^{- 1}

, Specific heat of ice is equal to 0.5 cal

g^{- 1}

^{\circ} C^{- 1}

. Find the resultant temperature of the mixture.

Q. The amount of heat required to convert 1 g of ice (specific 0.5 cal at

g^{- 1 o} C^{- 1}

) at

- 10^{0} C

to steam at

100

^{\circ} C

is ___________.

[ Given: Latent heat of ice is

80 C a l / g m,

Latent heat of steam is

540 C a l / g m

, Specific heat of water is

1 C a l / g m / C

]

Q. Calculate the amount of heat reqiured to convert

1 kg

of ice at

- 10^{\circ} C

into steam at

100^{\circ} C

. Specific heat capacity of ice is

= 2100 J {k g}^{- 1} K^{- 1}

, latent heat of fusion of ice

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

, specific heat capacity of water

= 4200 J {k g}^{- 1} K^{- 1}

and latent heat of vapourization of water

= 2.25 \times 10^{6} J {k g}^{- 1}

Q. How much heat is required to change

10 g

ice at

0^{o} C

to steam at

100^{o} C

? Latent heat of fusion and vaporization for

H_{2} O

are

80 c a l / g

and

540 c a l / g

respectively. Specific heat of water is

1 c a l / g

Q. The amount of heat required to convert

1

g of ice at

- 10^{0} C

into steam at

100^{0} C

is (approximately): (specific heat of water

=

4.187

J/g

^{0}

C, latent heat of fusion

=

334

J/g , latent heat of vaporization

=

2260

J/g, specific heat of ice

=

2.03

J/g) :

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The correct option is C Only 3Steam at 100oC has more amount heat than boiling water at the same temperature.Latent heat of fusion of ice is less than latent heat of vaporisation of water.Thus statements 1 and 2 are incorrect but statement 3 is correct.

The correct option is C Only $3$
Steam at $100^{o} C$ has more amount heat than boiling water at the same temperature.
Latent heat of fusion of ice is less than latent heat of vaporisation of water.
Thus statements 1 and 2 are incorrect but statement 3 is correct.