A 550 L at 1,400 kPa and 30 C compressed nitrogen storage has a leaky valve. resulting in gas to very slowly leak from the storage. It is noticed that after several days, the pressure in the tank has dropped to 600 kPa. Assuming that the leak happens slowly and under adiabatic conditions, determine the amount of nitrogen escaped from container in kg. Your Answer:

A piston-cylinder device contains satuated water vapor with a constant pressure. The mass and the pressure are listed in the table below. The water is heated by a resistance heater (see the picture below) within the cylinder. The heat supplied by the heater is given in the table below. The cylinder is insulated so there is not heat loss. (a) Determine the enthalpy per unit mass after the water vapor received heat. (b) Determine the temparature after the water vaopr received heat. Parameter Pressure Mass of water Heat supplied by the heater Unit kPa g KJ Value 300 26 7.1 heater

Question : Determine the units of the quantity s ̄/Ru, where s ̄ is the molar specific entropy and Ru is the universal gas constant. Explain your answer please

An adiabatic vessel has a valve that allows some water to be released. Initially it has 500 Kg of saturated liquid wate at a temperature of 50°C. Find the following: The temperature of remaining water if 10 Kg of water vapor escapes through the valve. If the remaining water is at 20°C, find the amount of water escaped as vapor. Assume specific heat of water, C = 4 Kj/Kg-K and Enthalpy of vaporization of water, AHvap 2400 Kj/Kg

CO2 needs to be compressed from p1=1bar, t1=300k to p2=40bar to transport it to remote sites for sequestration. what is the minimum energy requirement per kg of CO2 for the compressor? Should the compressor operate adiabatically or isothermally for the best energy efficiency? The environment is at Tenv=300k. Use accurate thermodynamic data for CO2 in this problem.