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Planck's Quantum Hypothesis

The specific ...

Question

The specific latent heat of ice is 383 $J g^{- 1}$

A

True

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B

False

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Solution

The correct option is B False
The statement if false that specific latent heat of ice is $383 J g^{- 1}$
Actually specific latent heat of ice is $336 J g^{- 1}$

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Q. Find the result of mixing

10 g

- 10^{o} C

10 g

10^{o} C

. Specific heat capacity of ice

= 2.1 J g^{- 1} K^{- 1}

, specific latent heat of ice

= 336 J g^{- 1}

and specific heat capacity of water

= 4.2 J g^{- 1} K^{- 1}

Q. A thermos-flask of negligible heat capacity contains 100 g of ice. Calculate the amount of water in the flask after condensation.

(Given that: Latent heat of ice

= 336 J g^{- 1}

, latent heat of steam

= 2260 J g^{- 1}

, specific heat capacity of water

= 4.2 J g^{- 1} C^{- 1}

80 g

30^{o} C

is poured on large block of ice at

0^{\circ}

C. The mass of ice that melts is

Given, Latent heat =

334 J / g

Specific heat of water

= 4.2 J g^{- 1} C^{o - 1}

Q. How much heat energy is released when 5.0 g of water at

20^{0} C

changes to ice at

0^{0} C

? Take specific heat capacity of water equal to 4.2

J g^{- 1} C^{- 1}

, specific latent heat of fusion of ice = 336

J g^{- 1}

10 g of ice at 0 $^{\circ} C$ absorbs 5460 J of heat energy to melt and change t water at 50 $^{\circ} C$ . Calculate the specific latent heat of fusion of ice. (Specific heat capacity of water is 4200 J $K g^{- 1} K^{- 1}$ .

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