A sphere of 0.047 kg aluminium is placed for sufficient time in a vessel containing boiling water so that the sphere is at 100 °C. It is then immediately transferred to a 0.14 kg copper calorimeter containing 0.25 kg water at 20 °C. The temperature of water rises and attains a steady-state at 23 °C. The specific heat capacity of aluminium is:

(Given that: Specific heat capacity of copper calorimeter =  and

the specific heat capacity of water )

1.

2.

3.

4.

Subtopic:  Calorimetry |
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When $$0.15$$ kg of ice at $$0^\circ \text{C}$$ is mixed with $$0.30$$ kg of water at $$50^\circ \text{C}$$ in a container, the resulting temperature is $$6.7^\circ \text{C}.$$
The heat of fusion of ice is: ($$S_{\text{water}}=4186$$ J kg-1 K-1)
1. $$3.43 \times 10^4$$ Jkg-1
2. $$3.34 \times 10^4$$ Jkg-1
3. $$3.34 \times 10^5$$ Jkg-1
4. $$4.34 \times 10^5$$ Jkg-1

Subtopic:  Calorimetry |
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The heat required to convert 3 kg of ice at –12 °C kept in a calorimeter to steam at 100 °C at atmospheric pressure is:

(Given, the specific heat capacity of ice = , the specific heat capacity of water = , the latent heat of fusion of ice =
and the latent heat of steam = .)

1.

2.

3.

4.

Subtopic:  Calorimetry |
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