Question

a.

b.

Imagine that you have a 7.00 L gas tank and a 4.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 atm, to what pressure should you fill the acetylene tank to ensure that you run out Assume ideal behavior for all gases. each gas at the same time? Express your answer with the appropriate units. View Available Hint(s) ? μΑ Value Units P = Submit Aerosol cans have a label that wams the user not to use them above a certain ternperature and not to dispose of them by incineration. Even an empty can contains residual gaseous propellant. For example, the residual pressure in a can is 1.26 atm when it s siting on a shelf at 23 C. If the can is placed on top of the furnace where the temperature reaches the boiling point of water, what is the pressure inside the can? Express your answer with the appropriate units View Available Hint(s) Value Units Submit

Answer 1

(a) Write the balanced reaction between acetylene and oxygen as follows CH3 2CO2+H2O From the above reaction the stoi chiometric relation between C,H2 and O is moles of O, moles of CH - 2,5 1 moles of CH2 moles of O :mol of O2 mol of CH required 1 2.5 Since the gases are ideal gas, PV nRT For constant temperature, PV cn (1) Pressure of acetylene, R = ? volume of acetylene, V= 4.00 L Pressure of oxygen, P = 155 atm volume of oxygen, = 7.00 L Substitute the corresponding values in equati on () and calcualte the pressure, Rx4.00 L 155 atm x7.00 L 2,5 155 atm x7.00 L 4.00 Lx 2.5 R 108.5 atm Therefore, the required solution is 108.5 atm (b) Initi al pressure, P = 1.26 atm initial temperature, T = 23°C Final pressure, = ? 23+273 K = 296 K Final temperature, Tz = 100°C= 100+273 K 373K (boiling point of water) Assuming constant volume andideal gas Substitute the corresponding valuesin the above equation to calcualte the pressure, P 1.26 atm x373 K 296 K R 1,59 atm Therefore, the required solution is 1.59 atm