Question

QUESTION 3 0.5 points If nitrogen gas has a density of 1.14 g/L, and an unknown gas has a density of 3.41 g/L at the same temperature and pressure, what is the ratio of the rate of effusion of the known gas to the rate of effusion of nitrogen? rate effusion unknown rate effusion N2 ? QUESTION 4 0.5 points The combustion reaction for octane burning in oxygen is: 2 C8H18 () 25 02(g)-16 CO2(g) +18 H20(g) AH = -10869 kJ Suppose an oxygen bomb calorimeter is loaded with oxygen gas and excess octane. The oxygen gas has a volume of 480.0 mL, pressure of 6.35 atm, and an initial temperature of 22.1 C The calorimeter has a heat capacity of 1.75 kJ/ °C Assuming the oxygen reacts completely, what is the final temperature of the calorimeter?

Answer both questions please and thank you!!!

Answer 1

Q.39 d = 1.14 g leto N. dg = 3.41 91et. rate of diffusion & rate of effusion of anknown rate of N2 effusion 1-14 = 0. 5 78 ~ 3.41 Q.4. 2 C3H18 (4 + 25 O2 g 16 CO2 g + 18 H20 g AH -10 869 EJ moles of Oq gas no= PV RT 02 6.35% 0.480 = 0.1257 0.0821 x 29.25 : 25 moles on produces 10869 kJ 0.1257 moles or 10869 001257 kJ 25 A = 54.67 kJ ST= &= 54.67 kJ = 31.29 °C 1.75kJ/oc final temperature = 31.29°C+22.1C= 53.34°C