1%^. III. о العنوان ١٢:٠٦ е Prave the temp For the adiabatic mixing of mixtures of gases, prove the temperature of gas mixture can be calculate using the equation below: T= Στο for the odivatic Mixing الس ۱/۱ A CIC

v Question Completion Status: QUESTION 11 50 kg of Refrigerant R134 are in the state of Saturated mixture at a pressure of P1a180 kpa. The quality x is equal to 0.2. It undergoes an expansion process to a superheated state of Py- 140 KPa and a temperature Ta-30°C. a) What is the initial temperature of the mixture. b) use the quality x to find the specific volume vy of the mixture (so called vavg) and the total volume Vy. Find the specific enthalpy of the mixture hy and conclude the total enthalpy H. d) Find the variation of enthalpy AH-H,-H, between the two states. e) Find the variation of volume between the two states.

1. A sample of gas A evaporates over water in a dosed system. What Is the pressure of gas A in kg/m2 if the total pressure Is 780 torr and water vapor pressure Is 1 atm?

m3 and 20 Kg 3. Three liquids of different qualities, S.G.,= 1.3, V2 = 0.002 %3D Liters of water, are poured together into a 300 gallons tank, filling it. If the resulting density of the mixture is 900 quantities of liquids. Also, find the weight of the mixture. Kg find the respective m3'

Two kg of a two-phase, liquid-vapor mixture of carbon dioxide exists at -40 °C in a 0.05m^3 tank.determinw the quality of the mixture...

5. A certain gas with Cp = 2.215 kg K KJ KJ expand from 0.142 m³ and R = 0.518 %3D %3D kg K and 300 °K to 0.425m³while the pressure remains constant at 106.869 KPa' Determine: a. T2 b. mass of gas C. Δh d. Δυ

NOTE: Complete solution and show the derivation/cancellation of units. N m An ideal gas has a gas constant of 319.8 kg K and a gas ratio of 1.26. Calculate the heat rejected per kg of gas: A. when the gas is contained in a rigid vessel at 3 bar and 315°C and then cooled until the pressure falls to 1.5 bar. B. when the gas enters a pipeline at 280°C and flows steadily at constant pressure to the end of the pipe where the temperature is 20°C.

6. (20 pts) The specific heat of a certain ideal gas is given as a function of 4.13 x 10* KJ 345.1 temperature: Cp = [1.54 - when temperature increases T kg K from 325°K to 1,100°K. Find the change of enthalpy. (Ans: 862.21

An ideal gas contained in a piston-and-cylinder device undergoes a thermodynamic cycle made up of three quasi-equilibrium processes. Step 1-2: Adiabatic compression from 330 K and 9.35 atm to 12.58 atm Step 2-3: Isobaric cooling Step 3-1: Isothermal expansion   c.) Calculate Q, W, ΔU and ΔH, in J/mole, for each step in the process and for the entire cycle. Assume that CP = (5/2) R. d.) Is this cycle a power cycle or a refrigeration cycle?  Explain. Calculate the thermal efficiency or COP of the cycle, whichever is appropriate.

A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder From previous experiments, this chemical reaction is known to absorb 322. kJ of energy. water bath The temperature of the water bath is monitored, and it is determined from this data that 188. kJ of heat flows out of the gases system during the reaction. O exothermic Is the reaction exothermic or endothermic? O endothermic O up Does the temperature of the water bath go up or ? O down down? O neither O in Does the piston move in or out? O out O neither O does work Does the gas mixture do work, or is work done on it? O work done on it O neither How much work is done on (or by) the gas mixture? Be sure your answer has the correct number of…