Molecular Physics | Thermodynamics Answers

A swimmer float in a still water to a distance of 5 kilometer on getting to the bank of the river the waves moves to the left hand side to a distance of12 kilometer

The length of a mercury column of a thermometer are 1.06cm &20.86cm respectively at a standard fixed points. What is the temperature of the body which produces 7.0cm of this mercury column

In a certain process, water condensing at 420°C, transfers heat to water evaporating at 250°C. The resulting heat is used in a power cycle which rejects heat at 27°C. The fraction of the available energy in the heat transfer process at 420°C that is lost due to irreversible heat transfer at 250°C is ________.

By burning a fuel the rate of heat release is 500 kw at 2000 K. Then energy is absorbed in a metallurgical furnace at the rate of 480 KW at 1000 K. If surrounding temperature is 300 K,the second law efficiency will be equal to?
a) 96 %
b) 84 %
c) 79 %
d) 64 %

2 kg of air at 5 bar, 80°C expands adiabatically in a closed system until its volume is doubled and its temperature become equal to that of the surrounding which is at 1 bar, 50°C. For the process, the maximum work is (if Cv= 0.718KJ/kg.k)
a) 23 KJ
b) 123 KJ
c) 223 KJ
d) 423 KJ

25 kg of water at 95°C mix with 35 kg of water at 35°C, the pressure being taken as constant and temperature of surrounding being 15°C. Total available energy (before mixing) is (Cp of water= 4.2 KJ/kg.k)
a) 1085 KJ
b) 400 KJ
c) 985 KJ
d) 685 KJ

A 25.0L tank contains 2.0kg of neon gas with a pressure of 98.0 atm at 28 degrees celcius. How many kilograms of oxygen can fill the tank under the same pressure and temperature?

A 25.0L tank contains 2.0 kg of neon gas with a pressure fo 98.0 atm at 250 degrees celsius. How any kilograms of O2 can fill the tank under the same pressure and temperature?