While the pressure remains constant at 689.5 kPa the volume of a system of air changes from 0.567 m3 to 0.283 m3. Determine the heat added/rejected.
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- Determine the quality of 170 kPa of steam when 470 kJ / kg of energy is lost from the saturated vapor. a. Steam quality b. What is the temperature of the steam? =The specific gravity of a fuel changes from 0.88 to 0.87. Determine the change in temperature from initial to final state in °C.40 m3 of air (R=0.287), at a gage pressure of 20kPa, and a temperature of 27 °C, then the specific volume of the air is: Select one: a. 0.72 m3/kg b. 0.72 cm3/kg c. 0.73 m3/kg d. 0.73 cm3/kg
- An air with mass of 0.564 kg and an unknown mass of CO2 occupy an 90L tank at 2132 kPaa. If the partial pressure of the CO2 is 321 kPaa. Determine its mass in kg. A. 0.138 B. 0.123 C. 0.169 D. 0.1531. A saturated water vapor is in a tank with a volume of 2.5 ft. It has a pressure at 25 psia. Due to heat transfer, the temperature decreases to 75°F. This process is held at isochoric condition. Determine the following: a. Initial temperature (°F) of the steam; b. Final pressure (in psia) of the steam; c. Total mass (Ibm) of steam in the tank at initial condition; d. Volume (in ft) and mass (Ibm) of liquid water in the tank at final condition. 2. Eighteen kilograms of ethyne has a temperature of 55°C and 35 bar. What is the volume (in cm3) occupied by ethyne? Use Peng/Robinson equation.A 300 L rigid tank contains Methane gas at 35 °C and 350 kPa. Some methane is allowed to enter the tank tell the until the density in the tank becomes 5.5 kg/m and the temperature at this point is 36 C. 3 What is the amount of gas that has entered the tank (kg)? Select one: a. 1.071 b. 1.131 c. 0.992 d. 0.922 e. None of the above
- What is the quality of saturated water at 370 K if 3 kg has a volume of 2 m³? A. 0.358 В. 0.465 С. 0.623 D. 0.786What is the specific internal energy of water at 50°C with a specific enthalpy of 1500 kJ/kg? Report your answer to one decimal place using rounding.Question # 3 - Water of 2 kg fills a part of the chamber with P = 300 kPa. The other part of the chamber is separated by a partition from the water part, and it is empty and evacuated. The total chamber volume is 1.5 m³; the part filled with water has 1/3 of the total volume. If the partition between the two parts is removed and water expands inside the entire chamber, determine the following: a) The water temperature before removing the partition b) The pressure after removing the partition if T = 3 °C c) For part (b), find the specific enthalpy water
- 2. Expansion of the steam in a cylinder follows the law pv1.1 = constant. The state of steam at the commencement of expansion is 10% wet and at 3 bars, and the expansion is continued until the volume is four times that qat the commencement. Calculate the quantity of heat which passes into or out of 1 kg of steam during expansion. 3. A combined separating and wire-drawing calorimeter was used to measure the dryness fraction of steam supplied to a steam engine. The following observations were made: Pressure of steam in steam pipe Temperature of steam inside the wire-drawing calorimeter 110 deg C Pressure of steam inside the wire-drawing calorimeter Barometer reading Steam used by the steam engine Water collected in the separating calorimeter Steam condensed on leaving the wire-drawing calorimeter 6.5kg 7bar 136mm of water 750mm of mercury 55kg 1kgConsider an air conditioning system which requires periodic air renewal. Therefore, fresh air must be introduced by mixing outside air (state 1) and return air from the conditioned room (state 2). The figure shows the principle of operation and data on the air quantities and the evaporator outlet (state 4). Determine the capacity (Q) of the evaporator coil in kJ/kg of dry air.Zeroth Law of Thermodynamics 1. A mercury manometer indicates a vacuum of 62 cm of mercury 20 ℃ in a condenser. Determine the absolute pressure in the condenser in pascals if thebarometer pressure is 750 mm of mercury. 2. A tank having a volume of 1.22 m3contains 6.48 kg of nitrogen and 7.78 kg of oxygen. Determine the density and the specific volume of the mixture.