Questions
A hot liquid takes 5 minutes to cool from 70°C to 60°C. How long will it take to cool from 60°C to 50°C ?
a
5 minutes
b
more than 5 minutes
c
less than 5 minutes
d
less or more than 5 minutes depending on the nature of liquid
detailed solution
Correct option is B
We know that rate of loss of heat c. temperature differencems(70−60)5∝70+602−T0∝65−T0and ms(60−50)t∝60+502−T0∝55−T0This show that t should be greater than 5 minutes.Talk to our academic expert!
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A calorimeter of mass 0.2 kg and specific heat 900 Containing 0.5 kg of a liquid of specific heat 2400J/kg/K. Its temperature falls from
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