Measuring Gas Pressure
Measuring gas pressure is a fundamental aspect of understanding the behavior of gases in various systems. Gas pressure refers to the force exerted by gas molecules against the walls of their container. This measurement is crucial in numerous fields, including chemistry, physics, engineering, and meteorology. By quantifying gas pressure, scientists and engineers can assess the state, efficiency, and safety of systems ranging from industrial processes to weather patterns. Various instruments, such as barometers, manometers, and pressure gauges, are employed to accurately measure gas pressure, enabling precise analysis and control in diverse applications.
Questions
- An open flask sitting in a lab fridge looks empty, but it is filled with a mixture of gases called air. If the flask volume is 2.50 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?
- Suppose that 1.28 g of neon gas and 2.49 g of argon gas are confined in a 9.87-L container at 27 C. What would be the pressure in the container?
- The equilibrium constant for the reaction: #PCl_5 rightleftharpoons PCl_3 + Cl_2# is 0.0121. A vessel is charged with #PCl_5#, giving an initial pressure of 0.123 atmospheric. How do you calculate the partial pressure of #PCl_3# at equilibrium?
- What happens to the volume of gas as the temperature of a gas increase at a constant pressure?
- What gases can be collected by water displacement?
- 20 cubic inches of a gas with an absolute pressure of 5 psi is compressed until its pressure reaches 10 psi. What is the new of volume of the gas?
- #CO_2# gas, in the dry state, may be produced by heating calcium carbonate. #CaCO_3 (s)DeltaCaO(s) + CO_2(g)#. What volume of #CO_2#, collected dry at 55 C and a pressure of 774 torr, is produced by complete thermal decomposition of 10.0 g of #CaCO_3#?
- A sample of nitrogen dioxide gas occupies #625 cm^3# at 70.0 °C and 15.0 psi. What is the final Celsius temperature if the volume is #545 cm^3# at 15.0 psi?
- Standard temperature and pressure are defined as what?
- Gases are sold in large cylinders for laboratory use. What pressure in atmospheres will be exerted by 2500 g of oxygen gas (O2) when stored at 22°C in a 40.0 L cylinder?
- When #"32.4 mL"# of liquid benzene (#C_6H_6#, #rho = "0.879 g/mL"#) reacts with #"81.6 L"# of oxygen gas, measured at #"1.00 atm"# and #"25°C"#, #1.19xx10^3 "kJ"# of heat is released at const. pressure. What is #DeltaH^@# for the following reaction?
- The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change?
- A 3.4 g sample of carbon dioxide (#CO_2#) gas is confined to a 450 mL rigid container at 55 deg C. How can you determine the pressure in the container?
- A canister contains 25 kPa of #CO_2#, 7.50 kPa of #N_2#, and 52.5 kPa of #O_2#. What is the total pressure within the canister?
- The gas in a container is at a pressure of 3.00 atm at 25°C. Directions on the container wam the user not to keep it in a place where the temperature exceeds 52°C. What would the gas pressure in the container be at 52°C?
- How do Boyle's law and Charles' law differ?
- How do you find the pressure of 214 moles air in a 25L scuba tank at 290 K?
- What is used to measure gas pressure in a closed container?
- Do molecules of the ideal gas at a particular temperature have the same kinetic energy?
- If 4 moles of gas are added to a container that already holds 1 mole of gas, what happens to the pressure inside the container due to the change in the amount of gas?