1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nezavi [6.7K]
3 years ago
8

Hydrogen sulfide,H2S, is a very toxic gas with a smell of rotten eggs. using the following: H2S+3/2 O2=SO2+H2O H2+1/2O2=H2O S+O2

=SO2 determine the enthalpy of formation for H2S g
Chemistry
1 answer:
Serga [27]3 years ago
5 0

Answer:

ΔH = -20kJ

Explanation:

The enthalpy of formation of a compound is defined as the change of enthalpy during the formation of 1 mole of the substance from its constituent elements. For H₂S(g) the reaction that describes this process is:

H₂(g) + S(g) → H₂S(g)

Using Hess's law, it is possible to sum the enthalpies of several reactions to obtain the change in enthalpy of a particular reaction thus:

<em>(1) </em>H₂S(g) + ³/₂O₂(g) → SO₂(g) + H₂O(g) ΔH = -519 kJ

<em>(2) </em>H₂(g) + ¹/₂O₂(g) → H₂O(g) ΔH = -242 kJ

<em>(3) </em>S(g) + O₂(g) → SO₂(g) ΔH = -297 kJ

The sum of -(1) + (2) + (3) gives:

<em>-(1) </em>SO₂(g) + H₂O(g) → H₂S(g) + ³/₂O₂(g) ΔH = +519 kJ

<em>(2) </em>H₂(g) + ¹/₂O₂(g) → H₂O(g) ΔH = -242 kJ

<em>(3) </em>S(g) + O₂(g) → SO₂(g) ΔH = -297 kJ

<em>-(1) + (2) + (3): </em><em>H₂(g) + S(g) → H₂S(g) </em>

<em>ΔH =</em> +519kJ - 242kJ - 297kJ = <em>-20 kJ</em>

<em />

I hope it helps!

You might be interested in
PLEASE HELP
garik1379 [7]
1. She would want a balanced force so she doesn't fall but, well, keep her balance.
2. Frictional force because when an object slows down it's because a higher amount of friction is acting on it.
3. It would be magnitude and direction because is like the size of the object and they need to know how much force it will take to move it.
4. Is the same as 3...
5. A push and a pull are a force. 

I hope this helps!

4 0
3 years ago
Read 2 more answers
Calculate the number of ATOMS in 1.0 mole of O2.
Wewaii [24]
There is 6.02*10^23 molecule per mole. And there is 2 atoms per oxygen molecule. So the answer is 1.204*10^24 atoms in 1.0 mole of O2.
7 0
3 years ago
Read 2 more answers
Metallic character is highest in the
krok68 [10]

Answer:

a

Explanation:

euejejejueeijeejejejejejje

5 0
3 years ago
What characteristic is descriptive of a solution?
Snezhnost [94]
A solution is a mixture of two or more substances combined so that it is uniform, which means you cannot see the components. <span />
8 0
3 years ago
Which biome contains mostly coniferous trees and receives 35 to 100 cm of rain per year?
fredd [130]

Answer: The Taiga Forest

Explanation: I just took the test on e2020

7 0
3 years ago
Other questions:
  • Where do scientists believe chemical evolution occurred?
    15·2 answers
  • Write chemical equation describing the complete combustion of liquid octane c8h18
    12·1 answer
  • Why does chromium have a 3 charge? why is chromium (vi) oxide [cro3} not chromium 3 oxide?
    12·1 answer
  • Carlos uses a machine to decrease his force Which of the following statements is true?
    12·1 answer
  • State the three rules that define how electrons are arranged in atoms
    9·2 answers
  • Why is water important to cells
    5·2 answers
  • Weather conditions (high or low temperature) to the mineral wool.
    11·1 answer
  • 1.
    9·1 answer
  • 1. Nene geese in Hawaii are endangered because of
    7·1 answer
  • Z is a covalent substance. In an experiment, a sample of pure solid Z was continually heated for 11 minutes
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!