A scientist proposes a new temperature scale in which the ice point is 25X (X is the new unit of temperature) and the steam point is 305X. The specific heat capacity of water in this new scale is (in `J*kg^(-1)*X^(-1))`
A
`4.2 times 10^(3)`
B
`3.0 times 10^(3)`
C
`1.2 times 10^(3)`
D
`1.5 times 10^(3)`
Text Solution
Verified by Experts
The correct Answer is:
D
`(305-25)X=100^(@)C` or, `1^(@)C=2.8 X` Hence, specific heat of water `=4200 J/(kg*^(@)C)=4200/(2.8)J*kg^(-1)*X^(-1)` `=1.5 times 10^(3)J*kg^(-1)*X^(-1)` The option (d) is correct
A scientist proposes a new temperature scale in which the ice point is 25 X(X is the new unit of ternperature) and the steam point is 305 X. The specific heat capacity of water in this new scale is (in Jkg^(-1)X^(-1) )
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A 10 Watt electric heater is used to heat a container filled with 0.5 kg of water. It is found that the temperature of water and the container rises by 3^@ K in 15 minutes. The container is then emptied, dried and filled with 2 kg of oil. The same heater now raises the temperature of container-oil system by 2^@ K in 20 minutes. Assuming that there is no heat loss in the process and the specific heat of water as 4200 Jkg^(-1) k^(-1) , the specific heat of oil in the same unit is equal to
