Question
Asked Nov 19, 2019
1 views
Calculate AH for the reaction:
C(graphite) 2H2(g) 1/2 O2(g)> CH30H()
Using the following information:
C(graphite)O2 => CO2(g) AHO
= -393.5 kJ
H2(g) 1/2 O2 => H2O(1) AHO = -285.8 kJ
CH3OH (I)3/2 O2(g) => CO2(g) 2H20() AH° = -726.4 kJ
help_outline

Image Transcriptionclose

Calculate AH for the reaction: C(graphite) 2H2(g) 1/2 O2(g)> CH30H() Using the following information: C(graphite)O2 => CO2(g) AHO = -393.5 kJ H2(g) 1/2 O2 => H2O(1) AHO = -285.8 kJ CH3OH (I)3/2 O2(g) => CO2(g) 2H20() AH° = -726.4 kJ

fullscreen
check_circle

Expert Answer

Step 1

Given:

Chemical reactions:

First chemical reaction is given by:
C(graphite)02 (g) - CO2(g)
-393.5 KJ
AH° :
Multiplying the chemical equation-2 with 2:
(H2 (g)1/202 (g) -» H20(1) AH = -285.8 KJ) x 2
(2H2 (g)02(g) -2H20) AH
-571.6 KJ)
Reversing the chemical equation-3
CO2 (g)2H20(- CH30H) 3/202(g) AH
726.4 KJ
help_outline

Image Transcriptionclose

First chemical reaction is given by: C(graphite)02 (g) - CO2(g) -393.5 KJ AH° : Multiplying the chemical equation-2 with 2: (H2 (g)1/202 (g) -» H20(1) AH = -285.8 KJ) x 2 (2H2 (g)02(g) -2H20) AH -571.6 KJ) Reversing the chemical equation-3 CO2 (g)2H20(- CH30H) 3/202(g) AH 726.4 KJ

fullscreen
Step 2

Using Hess law:

Adding al...

С(egraphite) + 0,(8) - св- (в
ДНО 3 —393.5 K]
2H,0(1) дн — —571.6 K)
(2H2(g)02(g)
с9о-
2H,оФ - сн,онФ + 3/20,(8) дН
726.4 KJ
(1)-»
C(graphite) 2H2 (g) 1/202(g)
ДН —D — 238.7 КJ
CH3ОН (1)
help_outline

Image Transcriptionclose

С(egraphite) + 0,(8) - св- (в ДНО 3 —393.5 K] 2H,0(1) дн — —571.6 K) (2H2(g)02(g) с9о- 2H,оФ - сн,онФ + 3/20,(8) дН 726.4 KJ (1)-» C(graphite) 2H2 (g) 1/202(g) ДН —D — 238.7 КJ CH3ОН (1)

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Chemistry

Chemical Thermodynamics

Related Chemistry Q&A

Find answers to questions asked by student like you

Show more Q&A add
question_answer

Q: The binding energy of electrons to chromium metal is 7.21x 10-19 J. What is the longest wavelength o...

A: Electromagnetic spectrum involves different radiations from the lowest to the highest frequency valu...

question_answer

Q: Complete and check if the answers are correct please!!! Thanks in advance!!!

A: A chemical reaction is symbolic representation of the conversion of substances to new substances.

question_answer

Q: aion ol tne reaction E17B.3(b) The rate constant for the first-order decomposition of a compound A i...

A: The term first order reaction is defined for those reactions which proceed at a rate that has a line...

question_answer

Q: How do you calculate the effective nuclear charge for the valence shell electrons of Cl-?

A: Effective nuclear charge of valence shell electron of Cl- ion:

question_answer

Q: 8. If 1 mol of argon and 1 mol of helium are trapped in a semi-porous container. At STP which gas wi...

A: According to the Graham's law the rate of the diffusion of a gas is inversely proportional to the sq...

question_answer

Q: List the following substances in order of decreasing boiling point CO2, Ne, CH3OH, KF

A: The boiling point of a substance is defined as a temperature at which a substance gets converted fro...

question_answer

Q: What is the change in energy associated with the transistion of an electron from the n=4 energy leve...

A: When the electrons are dropped from the excited energy state to the ground state, energy gets releas...

question_answer

Q: How many  "central" atoms are part of methanol (CH3OH)? What are the moleculare geometries of each c...

A: Given information:Molecule of methanol is given CH3OH.

question_answer

Q: A 100.0 mL sample of 0.18 M HClO4 is titrated with 0.27 M LiOH. Determine the pH of the solution aft...

A: The volume of HClO4 solution = 100 mL    Concentration of HClO4 = 0.18 MVolume of LiOH solution = 30...