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Byju's Answer

Standard VIII

Chemistry

Latent Heat of Vapourisation and Fusion

When 1 g of i...

Question

When 1 g of ice melts at $0^{\circ} C$

80 cal of heat is liberaed

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80 cal of heat is absorbed

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no heat is required

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160 cal heat is absorbed

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Solution

The correct option is B 80 cal of heat is absorbed
For melting of $1 g$ of ice $80 c a l$ of heat is required.
As latent heat of fusion for water is the heat required or released when $1 g$ of ice melts into water or water changes into ice.

Latent heat of fusion for water $= 80 c a l / g$

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Similar questions

Q. The amount of heat needed to melt

2 k g

of ice at its melting point, when latent heat of ice is

80 c a l / g

, is _____.

(1 c a l = 4.184 J)

Q. 1 g of a steam at

100^{_{-}^{0}} C

melt how much ice at

0^{_{-}^{0}} C

? (Latent heat of ice = 80 cal/gm and latent heat of steam = 540 cal/gm)-

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. The amount of heat required to convert

5 g

of ice at

0^{o} C

into water at

40^{o} C

is (Take heat of fusion

= 80 c a l / g

, specific heat

= 1 c a l / g

) :

Q. The heat required (in

c a l

) to change 10 g ice at

0^{o} C

to steam at

100^{o} C

is:
[ Heat of fusion and heat of 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

]

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When 1 g of ice melts at 0∘C

The correct option is B 80 cal of heat is absorbedFor melting of 1g of ice 80cal of heat is required.As latent heat of fusion for water is the heat required or released when 1g of ice melts into water or water changes into ice.Latent heat of fusion for water =80cal/g

When 1 g of ice melts at $0^{\circ} C$

The correct option is B 80 cal of heat is absorbed
For melting of $1 g$ of ice $80 c a l$ of heat is required.
As latent heat of fusion for water is the heat required or released when $1 g$ of ice melts into water or water changes into ice.

Latent heat of fusion for water $= 80 c a l / g$