Question 308: Thermodynamics & KTG

Question

1 g of a liquid is converted to vapour at 3 $$	imes$$ 10$$^5$$ Pa pressure. If 10% of the heat supplied is used for increasing the volume by 1600 cm$$^3$$ during this phase change, then the increase in internal energy in the process will be :

Accepted Answer

Work done = P$\Delta$V
= 3 ÃÂ 10
5
ÃÂ 1600 ÃÂ 10
Ã¢ÂÂ6
= 480 J
Only 10% of heat is used in work done.
Hence $\Delta$Q = 4800 J
 The rest goes in internal energy, which is 90% of
heat.
Change in internal energy = 0.9 ÃÂ 4800 = 4320 J

Answer

4800 J

Answer

4320 J

Answer

432000 J

Answer

4.32 $$	imes$$ 10$$^8$$ J

Thermodynamics & KTG

1 g of a liquid is converted to vapour at 3 $\times 10^5 Pa pressure. If 10% of the heat supplied is used for increasing the volume by 1600 cm^3$ during this phase change, then the increase in internal energy in the process will be :

Choose the correct answer: