200200 g of water at 2020C and 300300 g of water at 7070C are mixed in a calorimeter of negligible heat capacity. Assume no loss of heat. The final temperature is: 
1. 4040C
2. 5050C
3. 6060C
4. 4545C
Subtopic:  Calorimetry |
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Two liquids flow through a heat exchanger and exchange heat energy.
The first liquid has a mass flow rate (dmdt)=r1,(dmdt)=r1, and its temperature rises by Δθ1.Δθ1. For the second liquid, the flow rate (dmdt)=r2,(dmdt)=r2, and the temperature fall is Δθ2.Δθ2. The ratio of their specific heat capacities is:
1. Δθ1Δθ2Δθ1Δθ2 2. r1r2r1r2
3. r2Δθ2r1Δθ1r2Δθ2r1Δθ1 4. r2Δθ1r1Δθ2r2Δθ1r1Δθ2
Subtopic:  Calorimetry |
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The specific heat capacity of a body depends on:
 
1. the heat given
2. the temperature raised
3. the mass of the body
4. the material of the body
Subtopic:  Calorimetry |
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When 0.150.15 kg of ice at 0C0C is mixed with 0.300.30 kg of water at 50C in a container, the resulting temperature is 6.7C.
The heat of fusion of ice is: (Swater=4186 J kg–1 K–1)
1. 3.43×104 Jkg–1
2. 3.34×104 Jkg–1
3. 3.34×105 Jkg–1
4. 4.34×105 Jkg–1

Subtopic:  Calorimetry |
 58%
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