Question

Consider the following data: C(graphite) + O2(g) → CO2(g) ΔrH° = -394 kJmol-1 H2(g) +½ O2(g)...

Consider the following data: C(graphite) + O2(g) → CO2(g) ΔrH° = -394 kJmol-1 H2(g) +½ O2(g) → H2O(l) ΔrH° = -286 kJmol-1 C2H5OH(l) → 2 C(graphite) + 3 H2(l) + 0.5 O2(g) ΔrH° = +228 kJmol-1 What is the value of ΔrH° for the following reaction? C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l)

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

C(graphite) + O2(g) → CO2(g) ΔrH° = -394 kJmol-1 -----(1)

H2(g) +½ O2(g) → H2O(l) ΔrH° = -286 kJmol-1 ------(2)

C2H5OH(l) → 2 C(graphite) + 3 H2(l) + 0.5 O2(g) ΔrH° = +228 kJmol-1 ----(3)

C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l)  ΔrH° = ?

eqn (1) x 2 2C(graphite) + 2O2(g) → 2CO2(g) ΔrH° = 2 x -394 kJmol-1 => -788 kJmol-1 ----- (4)

eqn (2) x 3 3H2(g) +3/2 O2(g) → 3H2O(l) ΔrH° = 3 x -286 kJmol-1 => - 858 kJmol-1 ------(5)

eqn (3) C2H5OH(l) → 2 C(graphite) + 3 H2(l) + 0.5 O2(g) ΔrH° = +228 kJmol-1 ----(3)

add equation (3) + (4) + (5) -----------------------------------------------------------------------------------------------

C2H5OH(l)  + 3 O2(g) → 2 CO2(g) + 3 H2O(l) ΔrH° =  -788 - 858 +228 => -1418 kJmol-1

-----------------------------------------------------------------------------------------------------------------------------

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Calculate the standard enthalpy of reaction for 2 C(graphite) + 3 H2(g) C2H6(g) Given the following...
Calculate the standard enthalpy of reaction for 2 C(graphite) + 3 H2(g) C2H6(g) Given the following standard enthalpy of combustion data, ∆H˚comb (C(graphite) = –393.5 kJ·mol–1 H2(g) + ½ O2(g) H2O(l) ∆H˚rxn = –285.8 kJ·mol–1 2 C2H6(g) + 7 O2(g) 4 CO2(g) + 6 H2O(l) ∆H˚rxn = –3119.6 kJ·mol–1 (a) –84.6 kJ·mol–1 (b) 2440.2 kJ·mol–1 (c) –3799.0 kJ·mol–1 (d) –224.5 kJ·mol–1(e) not enough information provided
Given the following data: H2(g) + 1/2O2(g) → H2O(l) ΔH° = -286.0 kJ C(s) + O2(g)...
Given the following data: H2(g) + 1/2O2(g) → H2O(l) ΔH° = -286.0 kJ C(s) + O2(g) → CO2(g) ΔH° = -394.0 kJ 2CO2(g) + H2O(l) → C2H2(g) + 5/2O2(g) ΔH° = 1300.0 kJ Calculate ΔH° for the reaction: 2C(s) + H2(g) → C2H2(g)
Consider the following reaction. CO (g) +H2O (g) = CO2 (g) + H2 (g) If the...
Consider the following reaction. CO (g) +H2O (g) = CO2 (g) + H2 (g) If the reaction begins in a 10.00 L vessel with 2.5 mol CO and 2.5 mol H2O gas at 588K (Kc= 31.4 at 588 K). Calculate the concentration of CO, H2O, CO2, and H2 at equilibrium.
Find the ΔH and ΔE for the reaction below: C2H6(g) + 7/2 O2(g) à 2 CO2(g)...
Find the ΔH and ΔE for the reaction below: C2H6(g) + 7/2 O2(g) à 2 CO2(g) + 3 H2O (l) given the following data: ΔHf C2H6 = -84.7 kJ/mol                  ΔHf CO2 = -393.5 kJ/mol ΔHf H2O = -286 kJ/mol
ΔS is positive for which of the following reactions? A. 2 H2 (g) + O2 (g)...
ΔS is positive for which of the following reactions? A. 2 H2 (g) + O2 (g) --> 2 H2O (l) B. H2O (l) --> H2O (s) C. CO2 (s) --> CO2 (g) D. Ag+ (aq) + Cl- (aq) --> AgCl (s) E. N2 (g) + 3 H2 (g) --> 2 NH3 (g)
The water gas shift reaction is used commercially to produce H2(g): CO(g)+H2O(g)⇌CO2(g)+H2(g). Use the following data...
The water gas shift reaction is used commercially to produce H2(g): CO(g)+H2O(g)⇌CO2(g)+H2(g). Use the following data to determine: ΔfH∘[CO2(g)] = -393.5 kJ/mol ΔfH∘[H2(g)] = 0 kJ/mol ΔfH∘[CO(g)] = -110.5 kJ/mol ΔfH∘[H2O(g)] = -241.8 kJ/mol ΔS∘[CO2(g)] = -393.5 Jmol−1K−1 ΔS∘[H2(g)] = -393.5 Jmol−1K−1 ΔS∘[CO(g)] = -393.5 Jmol−1K−1 ΔS∘[H2O(g)] = -393.5 Jmol−1K−1 a. ΔrH∘ at 298 K. b. ΔrS∘ at 298 K. c. ΔrG∘ at 298 K. d. K at 650 K .
Find the deltaGo for the reaction using the following information: 6 C (s) + 3 H2...
Find the deltaGo for the reaction using the following information: 6 C (s) + 3 H2 (g) ----> C6H6 (l) 2 C6H6 (l) + 15 O2 (g) ---> 12 CO2 (g) + 6 H2O (l) DeltaGo= -6455 kJ C(s) + O2 (g) ---> CO2 (g) DeltaGo= -487 kJ H2 (g) + 1/2 O2 (g) ---> H2O (l) DeltaGo= -257 kJ  
Calculate Delta G for the following reactions: Rxn 1: CH4(g) + 2 O2(g) --> CO2(g) +...
Calculate Delta G for the following reactions: Rxn 1: CH4(g) + 2 O2(g) --> CO2(g) + 2 H2O(l) Rxn 2 2 H2 (g) + O2(g) --> 2 H2O(g)
Use Hess's law to determine ΔH∘ for the reaction CO(g)+12O2(g)→CO2(g), given that C(graphite)+12O2(g)→CO(g), ΔH∘=−110.54kJ/mol C(graphite)+O2(g)→CO2(g), ΔH∘=−393.51kJ/mol
Use Hess's law to determine ΔH∘ for the reaction CO(g)+12O2(g)→CO2(g), given that C(graphite)+12O2(g)→CO(g), ΔH∘=−110.54kJ/mol C(graphite)+O2(g)→CO2(g), ΔH∘=−393.51kJ/mol
(a) Consider the combustion of ethylene, given below. C2H4(g) + 3 O2(g) ? 2 CO2 (g)...
(a) Consider the combustion of ethylene, given below. C2H4(g) + 3 O2(g) ? 2 CO2 (g) + 2 H2O (g) If the concentration of C2H4 is decreasing at the rate of 0.26 M/s, what are the rates of change in the concentrations of CO2 and H2O? CO2 (b) The rate of decrease in N2H4 partial pressure in a closed reaction vessel from the following reaction is 41 torr/hr. N2H4 (g) + H2 (g) ? 2 NH3 (g) What are the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT