# The specific heat cap.. from 25°C to 125°C. Solved problem

### The specific heat capacity of the system during a certain process is given by cn = (0.4 + 0.004 T ) kJ/kg °C If the mass of the gas is 6 kg and its temperature changes from 25°C to 125°C find: (i) Heat transferred; (ii) Mean specific heat of the gas.

The specific heat capacity of the system during a certain process is given by

cn = (0.4 + 0.004 T ) kJ/kg °C

If the mass of the gas is 6 kg and its temperature changes from 25°C to 125°C find:

(i) Heat transferred;

(ii) Mean specific heat of the gas.

2. An artificial satellite revolves round the earth with a relative velocity of 800 m/s. If acceleration due to gravity id 9 m/s2 and gravitational force is 3600 N, calculate its kinetic energy.

3. The specific heat capacity of the system during a certain process is given by

cn = (0.4 + 0.004 T ) kJ/kg °C

If the mass of the gas is 6 kg and its temperature changes from 25°C to 125°C find:

(i) Heat transferred;

(ii) Mean specific heat of the gas.

4. A temperature scale of certain thermometer is given by the relation

t = a ln p + b

where a and b are constants and p is the thermometric property  of the fluid in the thermometer. If at the ice point and steam point the thermometric properties are found to be 1.5 and 7.5 respectively what will be the temperature corresponding to the thermometric property of 3.5 on Celcius scale.