Download presentation

Presentation is loading. Please wait.

Published byAshlyn Garratt Modified over 2 years ago

1
Review Problems

2
Water can be made from hydrogen and oxygen: H 2 (g) + O 2 (g) → H 2 O (g) Some experiments are run in a sealed 1 L flask at 350 K to determine the initial rate of reaction for different concentrations of reactants: [H2 ] M[O2] M Rate of formation of H2O M/sec 0.0500.1000.0048 0.0500.0500.0025 0.1000.0250.00120 If I began with 0.050 moles of both reactants, how long would it take to make 0.01 moles of water?

3
Orders of reaction [H2 ] M[O2] M Rate of formation of H2O M/sec 0.0500.1000.0048 0.0500.0500.0025 0.1000.0250.00120 Rate = k[H2] x [O2] y Rate 1 = k[0.050] x [0.100] y Rate 2 = k[0.050] x [0.050] y 0.0048 = [0.100] y 0.0025 = [0.050] y 1.92 =2 y Y =1

4
Orders of reaction [H2 ] M[O2] M Rate of formation of H2O M/sec 0.0500.1000.0048 0.0500.0500.0025 0.1000.0250.00120 Rate = k[H2] x [O2] y Rate 2 = k[0.050] x [0.050] Rate 3 = k[0.100] x [0.025] 0.0025 = [0.100] x 2 0.0012 = [0.050] x 2.08 =2*2 x 1.04 =2 x X=0

5
Rate = k[O 2 ] [H2 ] M[O2] M Rate of H2O M/sec 0.0500.1000.0048 0.0500.0500.0025 0.1000.0250.00120 0.0048 M/s = k [0.100 M] K =0.048 s -1 0.0025 = k [0.050] K =0.05 s -1 0.0012 =k[0.025] K =0.048 s -1 K avg = 0.0487 s -1

6
1 st order kinetics ln [O 2 ] t = - kt [O 2 ] 0 2H 2 (g) + O 2 (g) → 2H 2 O (g) If I began with 0.050 moles of both reactants, how long would it take to make 0.01 moles of water? 0.010 mol H 2 O * 1 mol O 2 = 0.005 mol O 2 2 mol H 2 O 0.050 mol O2 started – 0.005 mol O2 reacted = 0.045 mol left

7
1 st order kinetics ln [O 2 ] t = - kt [O 2 ] 0 Ln (0.045/0.05) = - 0.0487s -1 t t = 2.16 seconds!

Similar presentations

OK

S TOICHIOMETRY. R EMEMBER Chemicals react in molar ratios Ex)

S TOICHIOMETRY. R EMEMBER Chemicals react in molar ratios Ex)

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Differential display ppt online Ppt on wind energy in india 2012 Ppt on conservation of energy resources Ppt on non biodegradable wastewater Ppt on formal education definition Ppt on economic development in india Ppt on site search engine Ppt on viruses and anti viruses free Download ppt on soil erosion and conservation Ppt on training and placement cell