## Fig shows a cylinder of 8 cm inside diameter. solved problem

Fig shows a cylinder of 8 cm inside diameter having a piston loaded with a spring (stiffness = 150 N/cm of compression). The initial pressure, volume and temperature of air in the cylinder are 3 x 105 N/m2, 0.000045 m3 and 2o°C respectively. Determine the amount of heat added to the system so that piston …

## 1 kg of ethane (perfect) gas is compressed solved problem

1 kg of ethane (perfect) gas is compressed from 1.1 bar, 27 °C according to a law pV1·3 = constant, until the pressure is 6.6 bar. Calculate the heat flow to or from the cylinder walls. Given : Molecular weight of ethane = 30, cp = 1.76 kJ/kg K. 1 kg of ethane (perfect) gas is …

## 0.44 kg of air at 180°C expands adiabatically solved problem

0.44 kg of air at 180°C expands adiabatically to three times its original volume and during the process, there is a fall in temperature to 15°C. The work done during the process is 52.5 kJ. Calculate cp and cv. 0.44 kg of air at 180°C expands adiabatically to three times its original volume and during …

## Air at 1.02 bar.. compressed reversibly and.. solved problem

Air at 1.02 bar, 22°C, initially occupying a cylinder volume of 0.015 m3, is compressed reversibly and adiabatically by a piston to a pressure of 6.11 bar. Calculate : (i) The final temperature ; (ii) The final volume ; (iii) The work done. Air at 1.02 bar, 22°C, initially occupying a cylinder volume of 0.015 …

## A cylinder contain 0.45 m3 of a gas at 1 x .. solved problem

A cylinder contain 0.45 m3 of a gas at 1 x 105 N/m2 and 80°C. The gas is compressed to a volume of 0.13 m3, the final pressure being 5 x 105 N/m2. Determine : (i) The mass of gas ; (ii) The value of index ‘n’ for compression ; (iii) The increase in internal …

## Evaluate the situation relates to First Law.. 2022 solved problem

A housewife, on a warm summer day, decides to beat the heat by closing the window and door in the kitchen and opening the refrigerator door. At first she feels cool and refreshed, but after a while the effect begin to wear off. Evaluate the situation as it relates to First Law of Thermodynamics, considering …

## A 15 cm diameter vertical cylinder, closed.. solved problem

A 15 cm diameter vertical cylinder, closed by a piston contains a combustible mixture at a temperature of 30°C. The piston is free to move and its weight is such that the mixture pressure is 3 bar. Upper surface of the piston is exposed to the atmosphere. The mixture is ignited. As the reaction proceeds, …

## Prove reversible adiabatic pvγ = constant 22 solved problem

The following is the equation which connects u, p and v for several gases u = a + bpv where a and b are constant. Prove that for a reversible adiabatic process, pvγ = constant, where γ = (b + 1)/b. The following is the equation which connects u, p and v for several gases …

## 0.2 m3 of air at 4 bar and 130°C is contained in.. solved problem

0.2 m3 of air at 4 bar and 130°C is contained in a system. A reversible adiabatic expansion lakes place till the pressure falls to 1.02 bar. The gas is then heated at constant pressure till enthalpy increases by 72.5 kJ. Calculate : (i) The work done ; (ii) The index of expansion, if the …

## A movable frictionless piston closes a.. 2022 solved problem

A movable frictionless piston closes a fully insulated cylinder on one side and offers a constant resistance during its moti0n. A paddle work is drawn into the cylinder and does work on the system. Prove that the paddle work is equal to change in enthalpy. A movable frictionless piston closes a fully insulated cylinder on …