Thermodynamics

A flow of water at some velocity out of a nozzle is used to wash a car. The water then falls to the ground. What happens to the water state in terms of V, T and s? 

Steam at 10 bar absolute pressure and 0.95 dry enters a super heater and leaves at the same pressure at 250°C. Determine the change in entropy per kg of steam. Take C_ps = 2.25 kJ/kg K.

Take a control volume around your kitchen refrigerator and indicate where the components shown in Figure 1.6 are located and show all flows of energy transfer.

The black grille on the back of a refrigerator has a surface temperature of 95 F with a total surface area of 10 ft². Heat transfer to the room air at 70 F takes place with an average convective heat transfer coefficient of 3 Btu/h ft² R. How much energy can be removed during 15 minutes of operation?

Why do we write ΔE or E₂ – E₁ whereas we write ₁Q₂ and ₁W₂?

At certain locations geothermal energy in undergound water is available and used as the energy source for a power plant. Consider a supply of saturated liquid water at 150°C. What is the maximum possible thermal efficiency of a cyclic heat engine using this source of energy with the ambient at 20°C? Would it be better to locate a source of saturated vapor at 150°C than use the saturated liquid at 150°C?  

 A U–tube manometer using mercury shows that the gas pressure inside a tank is 30cm. Calculate the gauge pressure of the gas inside the vessel. Take g = 9.78m/s², density of mercury =13,550kg/m³.

Define thermodynamic equilibrium of a system and state its importance. What are the conditions required for a system to be in thermodynamic equilibrium? Describe in brief.
Or
What do you known by thermodynamic equilibrium.

What is the difference between a nozzle flow and a throttle process? 

 In a steady state single flow s is either constant or it increases. Name the process.