Thermodynamics ...

During a constant pressure expansion of a gas, 33.3% heat is converted into work while the temperature rises by 20 K. The specific heat of the gas at constant pressure as proportion of work, (W) is

For a polytropic process, which among the following options gives the correct relationship between heat and work?(W = polytropic work)

When a system is taken from state ‘x’ to state ‘y’ then 30 kJ of heat flows into the system and the system does 10 kJ of work. When the system is returned from state ‘y’ to state ‘x’ along another path, then work done on the system is 8 kJ. What is the amount of heat liberated?

Air at 150 kPa and 323 K is filled in a rigid vessel of 0.05 m³ capacity. For air, assumed as an ideal gas, specific heat at constant volume is 0.7163 kJ/kg.K and the specific gas constant is 0.287 kJ/kgK. Neglect kinetic and potential energy changes. If 30 kJ of heat is added, the final temperature (in K) of air (up to 1 decimal place) is_______

A piston-cylinder device contain Helium gas initially at 150 kPa, 20°C and 0.5 m³. The Helium is now compressed in a polytropic process PVⁿ = constant) to 400 kPa and 140°C. Determine the magnitude of heat loss or gain (in kJ) during the process. R_He = 2.0769 kJ/kgK, C_v = 3.1156 kJ/kgK.

Air is allowed to pass through a completely insulated turbine with inlet velocity of air and temperature is 20 m/s and 500 K respectively. It was noted that air at outlet has a velocity of 10 m/s and 100 K respectively. Find the work produced by turbine? Take C_p = 1.005 kJ/kg