A 1-m tank containing air at 10 °C and 350 kPa is connected through a valve to another tank containing 3 kg of air at 35 °C and 200 kPa. Now the valve is opened, and the entire system is allowed to reach a temperature of 20 °C. Determine the volume of the second tank.
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- Q1) The heat capacity at constant volume of hydrogen sulfide at low pressures is given by Eq. Q1-1: Co[kJ/(mol•°C)] = 0.0252 + 1.547 × 10-T – 3.012 × 10-9T² Eq. Q1-1 ........ Where, Tis temperature in °C. A quantity of H2S is kept in a piston-fitted cylinder with initial temperature, pressure, and volume equal to 25°C, 2.0 atm, and 3.0 liters, respectively. i- Calculate the heat (kJ) required to raise the gas temperature from 25°C to 1000°C, if the heating takes place at constant volume (i.e., if the piston does not move). ii- For a closed system at constant pressure with negligible kinetic and potential energy changes, the specific heat is determined by Eq. Q1-2: Cp = Cy + 0 008314 Eq. Q1-2 calculate the heat (J) required to raise the gas from 25°C to 1000°C at constant pressure. What would the piston do during this process? Given the gas constant = 0 08206 atm. Lit/ (mol. K)As shown in the figure below, a hydraulic system has two pistons of different diameter and uses a liquid of density ? = 850 kg/m3. The smaller piston has a diameter of 5.5 cm and a mass of 1.6 kg and the larger piston a diameter of 14 cm and a mass of 2.8 kg. Determine h, the height difference between the two pistons.A frictionless piston-cylinder device contains 100 kg of saturated liquid refrigerant-134a. If the piston's mass exerts a pressure of 600 kPa on the refrigerant, the volume (liters) of refrigerant-134a in the piston is Select one: 0.819 81.99 0.167 167
- 1. Oxygen at 30°C and 300 kPa absolute pressure expands isotherrnally to an absolute pressure of 120 kPa. Determine the final density of the gas. Ans. 1.52 kg/m³ 2. Air is enclosed by a rigid cylinder containing a piston. A pressure gage attached to the cylinder indicates an initial reading of 25 psi. Determine the reading on the gage when the piston has compressed the air to one-third its original volume. Assume the compression process to be isothermal and the local atmospheric pressure to be 14.7 psi. Ans. 104 psig 3. The viscosity of liquids can be measured through the use of a rotating cylinder viscometer of the type illustrated in Fig. P1.3. In this device the outer cylinder is fixed and the inner cylinder is rotated with an angular velocity w. The torque T, required to develop w is measured and the viscosity is calculated from these two measurements. Develop an equation relating u, w, T, e, Ro and Ri. Neglect end effects and assume the velocity distribution in the gap is linear.…2. Air is enclosed by a rigid cylinder containing a piston. A pressure gage attached to the cylinder indicates an initial reading of 25 psi. Determine the reading on the gage when the piston has compressed the air to one-third its original volume. Assume the compression process to be isothermal and the local atmospheric pressure to be 14.7 psi. Ans. 104 psigA standard vapour is compressed to half its volume without changing its temperature. The result is that 1) All the vapour condenses to liquid 2) Some of the liquid evaporates and the pressure does not change 3) The pressure is twice that of its initial value 4) Some of the vapour condenses and the pressure does not change