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Q. No.
According to the principle of calorimetry for an isolated system:
1. Heat lost by part at higher temperature equals the heat gained by part at lower temperature.
2. Heat lost by part at higher temperature is always less than the heat gained by part at lower temperature.
3. Heat lost by part at higher temperature is always more than heat gained by part at lower temperature.
4. Heat lost by part at higher temperature is never equal to heat gained by part at lower temperature.
Subtopic:  Calorimetry |
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Level 1: 80%+
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5 gm of water at 30°C and 5 gm of ice at –20°C are mixed together in a calorimeter. The water equivalent of the calorimeter is negligible and the specific heat and the latent heat of ice are 0.5 cal/gm-°C and 80 cal/gm respectively. The final temperature of the mixture is:

1. 0°C

2. –8°C

3. –4°C

4. 2°C

Subtopic:  Calorimetry |
 91%
Level 1: 80%+
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Which graph best represents the temperature \((T)\) versus heat energy \((Q)\) relationship as a block of ice at \(-12 ^ \circ \text {C}\) is gradually heated and converted into steam at \(100^ \circ \text {C}?\)
1. 2.
3. 4.
Subtopic:  Calorimetry |
 87%
Level 1: 80%+
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A copper block of mass 5.0 kg is heated to a temperature of 500°C and is placed on a large ice block. The maximum amount of ice that can melt is: [Specific heat of copper: \(0.39~\mathrm{Jg}^{-1}{ }^{\circ} \mathrm{C}^{-1}\) and latent heat of fusion of water: 335 J g–1 ]
1. 1.5 kg
2. 5.8 kg
3. 2.9 kg
4. 3.8 kg
Subtopic:  Calorimetry |
 85%
Level 1: 80%+
JEE
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An aluminium block of mass \(2.5\) kg is supplied with \(9000\) J of thermal energy. This causes its temperature to rise by \(4\) K. Based on this data, which expression gives the specific heat capacity of this aluminium block?
(assume that the block remains solid throughout and that no additional energy is exchanged between the block and the surroundings.)

1. \(9000\times2.5\times4\) J kg–1 K–1 2. \(\dfrac{2.5\times4}{9000}\) J kg–1 K–1
3. \(\dfrac{9000\times2.5}{4}\) J kg–1 K–1 4. \(\dfrac{9000}{ 2.5 \times4}\) J kg–1 K–1
Subtopic:  Calorimetry |
 85%
Level 1: 80%+
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Which of the following pairs of physical quantities may be represented in the same unit ?

1.  heat and temperature

2.  temperature and mole

3.  heat and work

4.  specific heat and heat

Subtopic:  Calorimetry |
 85%
Level 1: 80%+
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Equal masses of water at temperatures of \(20^\circ\text C,~50^\circ\text C,~\text{and}~80^\circ\text C\) are mixed in a calorimeter of negligible heat capacity. The final temperature of the water is: (assuming no loss of heat)
1. \(50^\circ\text C\) 2. \(60^\circ\text C\)
3. \(40^\circ\text C\) 4. \(90^\circ\text C\)
Subtopic:  Calorimetry |
 85%
Level 1: 80%+
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Ice initially at \(–10^\circ\text C\) is heated and converted to steam at \(100^\circ\text C\) using a constant power source. Which of the following graphs correctly represents the variation of temperature \((T)\) with time \((t)\) during this process?
1. 2.
3. 4.
Subtopic:  Calorimetry |
 84%
Level 1: 80%+
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In a steel factory, it is found that to maintain \(M\) kg of iron in the molten state at its melting point, an input power \(P\) watt is required. When the power source is turned off, the sample completely solidifies in time \(t\) seconds. The latent heat of the fusion of iron is:

1. \(\dfrac{2Pt}{M}\) 2. \(\dfrac{Pt}{2M}\)
3. \(\dfrac{Pt}{M}\) 4. \(\dfrac{PM}{t}\)
Subtopic:  Calorimetry |
 83%
Level 1: 80%+
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If heat is supplied to a solid, its temperature:

(A) must increase
(B) may increase
(C) may remain constant
(D) may decrease

Choose the correct option from the options given below:

1. (A) and (B) only
2. (B) and (C) only
3. (C) and (D) only
4. (A) and (D) only

Subtopic:  Calorimetry |
 83%
Level 1: 80%+
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