Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at $$100~^{\circ}\mathrm{C}$$, while the other one is at $$0~^{\circ}\mathrm{C}.$$ If the two bodies are brought into contact, then assuming no heat loss, the final common temperature is:

 1 $$50~^{\circ}\mathrm{C}$$ 2 more than $$50~^{\circ}\mathrm{C}$$ 3 less than $$50~^{\circ}\mathrm{C}$$ but greater than $$0~^{\circ}\mathrm{C}$$ 4 $$0~^{\circ}\mathrm{C}$$
Subtopic: Â Calorimetry |
Â 64%
From NCERT
NEET - 2016
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A piece of ice falls from a height $$h$$ so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice. The value of $$h$$ is:
[Latent heat of ice is $$3.4 \times 10^5~\text{J/kg}$$ and $$g=10~\text{N/kg}$$]
1. $$544~\text{km}$$
2. $$136~\text{km}$$
3. $$68~\text{km}$$
4. $$34~\text{km}$$
Subtopic: Â Calorimetry |
Â 81%
From NCERT
NEET - 2016
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Steam at $$100~^{\circ}\mathrm{C}$$ is passed into $$20~\text{g}$$ of water at $$10~^{\circ}\mathrm{C}$$. When water acquires a temperature of $$80~^{\circ}\mathrm{C}$$, the mass of water present will be:
[Take specific heat of water $$= 1~\text{cal g}^{-1}~^\circ\mathrm{C}^{-1}$$ and latent heat of steam $$= 540~\text{cal g}^{-1}$$]
1. $$24~\text{g}$$
2. $$31.5~\text{g}$$
3. $$42.5~\text{g}$$
4. $$22.5~\text{g}$$

Subtopic: Â Calorimetry |
Â 69%
From NCERT
AIPMT - 2014
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Liquid oxygen at $$50$$ K is heated up to $$300$$ K at a constant pressure of $$1$$ atm. The rate of heating is constant. Which one of the following graphs represents the variation of temperature with time?

 1 2 3 4
Subtopic: Â Calorimetry |
Â 80%
From NCERT
AIPMT - 2012
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