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Standard XII

Chemistry

Difference between Internal Energy and Enthalpy

A calorimeter...

Question

A calorimeter contains ice. The energy of 500 calories is required, to heat the system from270 K to 272 K and energy of 16600 calories isrequired to heat that system from 272 K to 274 K.The heat capacity is defined as the product ofmass of the object and its specific heat. The specific heat of ice is 0.5 cal/gram-K. The heat capacity of calorimeter is (1)150 cal/K (2)100 cal/K (3)120 cal/K (4)180 cal/K

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Similar questions

Q. A calorimeter contains ice. Find the water equivalent of the calorimeter if

500 cal

are required to heat it together with its contents from

270 K

272 K

and

16600 cal

from

272

274 K

. Take specific heat of water as

1 c a l / g m^{o} C

and that of ice as

0.5 c a l / g m^{o} C

Q. A metallic calorimeter of mass 100g contains 200 g of ice and the initial temperature of the calorimeter and the ice is

- 10^{\circ} C

. Heat is supplied to the system containing calorimeter and ice at a constant rate of

50 c a l s^{- 1}

. Find the time required to raise the temperature of the system to

50^{\circ} C

. [Neglect the loss of heat to the surroundings].

Take specific heat capacity of calorimeter and ice as

0.2 c a l g^{- 1}^{\circ} C^{- 1}

and

\frac{1}{2} c a l g^{- 1}^{\circ} C^{- 1}

.Take latent heat of fusion of ice as

80 c a l g^{- 1}

and specific heat capacity of water as

1 c a l g^{- 1}^{\circ} C^{- 1}

Q. The water equivalent of a copper calorimeter is

4.5 g

. If the specific heat of copper is

0.09 cal g^{- 1} C^{- 1}

, then

Q. The water equivalent of a copper colorimeter is 4.5g. If specific heat of copper is 0.09 cal /g/

^{\circ}

C, then
1) Mass of the calorimeter is 0.5kg
2) Thermal capacity of the calorimeter is 4.5 cal/ C
3)The heat required to raise the temperature of the calorimeter by 8

^{\circ}

C will be 36 cal.
4) Heat required to melt 15 gm of ice placed in the calorimeter will be 1200 cal
Choose the correct option from below

An aluminum container of mass 100 g contains 200 g of ice at $- 20^{\circ} C$ . Heat is added to the system at a rate of $100 c a l s^{- 1}$ . Which of the following represents the variation in the temperature of the system as a function of time? Specific heat capacity of ice = $0.5 c a l g^{- 1}$ $^{\circ}$ $C^{- 1}$ , specific heat capacity of aluminum = $0.2 c a l g^{- 1}$ $^{\circ}$ $C^{- 1}$ and latent heat of fusion of ice = $80 c a l g^{- 1}$ .

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