CPB 314 Lecture 10: CPB 314 (10)

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cerisebear771

9 Mar 2017

School

Miami University

Department

Chemical, Paper & Biomedical Engineering

Course

CPB 314

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Document Summary

Equation of state: any equation that relates the pressure, temperature, and specific volume of a substance. The simplest and best-known equation of state for substances in the gas phase is the ideal-gas equation of state. This equation predicts the p-v-t behavior of a gas quite accurately within some properly selected region. The ideal-gas relation is often not applicable to real gases; thus, we need to be careful when using it. real gases behave as an ideal gas at low densities (i. e. , low pressure, high temperature). Below 10 kpa, water vapor can be. Treated as an ideal gas, regardless ofits temperature, with negligible error(less than 0. 1 percent). At higher pressures, however, the ideal gas assumption yields unacceptable errors, particularly in the vicinity of the critical point and the saturated vapor line. In air-conditioning applications, the water vapor in the air can be treated as an ideal gas.

Related Questions

(2c). (4p) Find the mass of air in a cuboid classroom of dimensions 7m Â´ 8m Â´ 5m, assuming it is an ideal gas at 1 atm and 25 ^oC.

(2d). (5p) Use the ideal gas equation of state to find the specific volume of water vapor at 8 kPa and 100 ^oC, if the molar weight of water is 18.0 g/mol. Why is the ideal gas equation a good approximation for water at this temperature and pressure? (Tip: you need check it using the compressibility factor)

(2e). (5p) Based on the Nelson-Obert general compressibility chart (Figure A-15), please evaluate the compressibility factor, Z, for the known reduced temperature and pressure, T_R = 1.2 and P_R=2.0 (2.5p). Can this substance be considered as an ideal gas? Explain! (2.5p).

thermal!

An instrument used to measure the pressure of a gas in a laboratory is called a barometer manometer sphygmomanometer spectrophotometer spectrometer The pressure of a gas in a container is1.85 atm and occupies a volume of 12.5 L If the original volume is reduced by hall at constant temperature, what would happen to the pressure? The pressure would ... double reduce by half remain the same On a hot summer day, you notice that a bag of chips left in your vehicle has inflated. As temperature increased, gas molecules .......... kinetic energy and the volume of gas inside the bag ....... Lost/increased gained/decreased lost/decreased gained/increased What mass of oxygen gas (O_2) is needed to fill a 585 L tank at STP? 0 835 kg 0.765 kg 0.417 kg Which of the following will cause the volume of an ideal gas to triple in value Raising the temperature from 25 degree C to 75 degree C at constant pressure. Lowering the absolute temperature by a factor of 3 at constant pressure. Lowering the pressure by a factor of 3 white the temperature stays constant. A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.41 atm. What is the identity of the halogen? Br_2 F_2 C1_2 l_2 Define vapor pressure. partial pressure cf water in a Squid mixture partial pressure of wafer in a gases mixture condensation of water A mixture of 1.0 mol He and 1.0 mol No are at STP in a rigid container. Which of the following statements is TRUE Both gases have the same average kinetic energy. Both gases contribute equally to the density of the mixture under these conditions. Both gases have the same molecular speed. The following reaction is used to generate hydrogen gas in the laboratory Mg(s) + 2 HC1(aq) rightarrow MgC1_2(aq) + H_2(g) If 243 mL of gas is collected at 25 degree C and has a total pressure of 745 mm Hg. what mass of hydrogen is produced? Listed are vapor pressures at select temperatures: Listed are water vapor Pressures at select temperatures: 0.0144 g H_2 0.0717 g H_2 0.0190 g H_2 Which of the following compounds will behave LEAST like an ideal gas at low temperatures? He SO_2 H_2 N_2 F_2 A container Filed with neon and argon gas is 25.00% by volume neon. What is the partial pressure of argon it the total pressure inside the container is 5 500 atm? 412 5 atm 1.375 atm 4.125atm 28 5 L of an unknown gas has a mass of 55.92 g at STP. What is the identity of the unknown gas? CO_2 O_2 N_2 Explain what would happen to the following equilibrium upon the addition of more hydrogen gas? H_2O(g) + CO(g) doubleheadarrow H_2(g) + CO_2(g) producing more reactants producing more CO_2 equilibrium will not be attected For the following reaction, K_5 = 5.6 x 10^-6 (at 400 K): 2 NOC(g) doubleheadarrow 2 No_2(g) + C1_2(g) If [NOCI] = 0.0222 M, [CI_2] = 0.0222 M, [NO_2] = 0.989 M at once, which statement would be true? The rate of forward and reverse reaction are equal. Neither forward nor reverse reaction would occur. Rate of forward reaction would be taster. Rate of reverse reaction would be faster. K_c = 1.10 times 10^18 for CO(g) + 1/2 O_2(g) doubleheadarrow CO_2(g) Calculate the equilibrium concstant K_0 for the following CO_2(g) doubleheadarrow CO(g) + 1/2 O_2(g) 1.04 times 10^9 0.55 times 10^18 -1.10 times 10^18 9.09 times 10^19

CPB 314 Lecture 10: CPB 314 (10)

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