Question

a. in the reaction: 2 C2H6 (g) + 7 O2 (g) -----> 4 CO2 (g) + 6 H2O (g), increasing the concentration of C2H6 (g) will:

increase the acivation energy, decrease the activation energy, increase reaction rate OR decrease the reaction rate?

b. An equilibrium constant with a value of 5.7 X 10^-8 indicates that at equilibrium:

the reactants are favored, the products are favored, OR approximately equal concentrations of reactions and products are present.

c. A balloon that contains 0.500 L of helium at 25 degrees celsius is cooled to 11 degrees celsius at a constant pressure. What volume does the balloon now occupy?

d. Which cylinder at STP will contain the greatest number of gas particles?

5.0 L cylinder of neon, helium, or nitrogen

Answer 1

Augwer: @ 2.62 Holg) + 70219) - 4 Co2lg) + 6H2019) * increasing the concentration of C2 4619) will increase reaction rate (as adding reactant shifts reaction in forward chiechon according to Le-chateliar principle; nonce rate is increased due to more formation of product). 6 An equilibrum couptent with a value of 5.7x10-8 indicate that at equilibrium : the reactants are favoured las when K <18 backward reaction is favoured means more reactants.

7 At Now congtent pressure and meleg v? [ ape neCoupleut 7 u,= o.sool ; T = 299K (25°c) U2= ? ; T2 = 284k (11) - o.sooL = V2 298K 284 K @ " V₂ = 0.476L (answa) At STP ; melar volume = 82.4 lit and all the the above gases would occupy same number of gaz parte heg (aq meleg will be scame according to Avogadhool & law) 6 please rate êt"