Help on both please 5 AE 1 Your A 80.0 L stainless steel container was charged w
ID: 590467 • Letter: H
Question
Help on both please 5 AE 1 Your A 80.0 L stainless steel container was charged with 4.00 atm of hydrogen gas and s.00 atm of oxygen gas. A spark ignited the mixture, preducing water. What is the pressure in the tank at a constant temperature of 25 C? atm What is the pressure in the tank at a constant temperature of 125 C7 atm A compound contains only c, H, and N. It is 58.51% c ard 7.37% H by man. Helium, eer ren through a porom frit S 54 tin es as fast as the compounddoes. Determine the e pirical and molecular formulas of this compound. (Type your answer using the format C2H2N for Ca empirical formula molecular formula
Explanation / Answer
3) We will assume that the pressures due to the gases are the partial pressures and the total pressure of the system is additive, i.e, the total pressure is the sum of the partial pressures of the two gases. Therefore, at 25°C, the total pressure in the tank is (4.00 + 5.00) atm = 9.00 atm (ans).
Assume both hydrogen and oxygen and the product of the reaction to be gaseous. The volume of the tank remains constant; assume that the number of moles of the reactants and the products are constant.
Use Charle’s law for pressure and write
P1/T1 = P2/T2
where P1 = 9.00 atm; T1 = 25°C = (25 + 273) K = 298 K and T2 = 125°C = (125 + 273) K = 398 K.
Plug in values and get
(9.00 atm)/(298 K) = P2/(398 K)
====> P2 = (9.00 atm)*(398 K)/(298 K) = 12.020 atm 12.02 atm.
The pressure in the tank at 125°C is 12.02 atm (ans).
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