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
Montano1993 [528]
3 years ago
9

Consider the following intermediate chemical equations.

Chemistry
1 answer:
vichka [17]3 years ago
3 0

Answer:

        Overall\text{ }enthalpy=-1,300kJ

Explanation:

According to Hess’s law, you can calculate the <em>enthalpy  of the overall chemical reaction </em>by adding enthalpy changes of the <em>intermediate reactions, at the same temperature.</em>

First, you must find how the intermediate equations form the overall equation.

Here, the overall equation is:

            P_4O_{6}(s)+2O_2(g)\rightarrow P_4O_{10}(s)

To obtain it you can swift both the first and second intermediate equations and sum them. When you swift a chemcial equation, the corresponding enthalpy change has the opposite sign:

Change

              P_4(s)+3O_2(g)\rightarrow P_4O_6(s)              \Delta H_1=-1,640kJ

     to

         P_4O_6(s)\rightarrow P_4(s)+3O_2(g)            -\Delta H_1=1,640kJ

Change

             P_4O_{10}(s)\rightarrow P_4(s)+5O_2(g)          \Delta H_2=2,940kJ

    to

             P_4(s)+5O_2(g)\rightarrow P_4O_{10}(s)         -\Delta H_2=-2,940kJ

Now add the two transformed equations:

             P_4O_{6}(s)+2O_2(g)\rightarrow P_4O_{10}(s)

Overall\text{ }enthalpy=-\Delta H_1+-\Delta H_2=1,649kJ+(-2,940.1kJ)=-1300.1kJ

Overall\text{ }enthalpy=-1,300kJ

You might be interested in
HELP ASAP!!! Which two energy transformations are shown in the photo? A. Chemical energy → electromagnetic energy B. Chemical en
diamong [38]

Answer:

Chemical energy _ thermal energy

4 0
3 years ago
Read 2 more answers
What neutral element has 17 electrons an 18 neutrons?
pishuonlain [190]

Answer:

chlorine atom

A chlorine atom has 17 protons, 18 neutrons, and 17 electrons.

Explanation:

4 0
2 years ago
Read 2 more answers
Why air is classified as a mixture​
Vika [28.1K]

Answer:

See explanation

Explanation:

Air contains a mixture of several molecules and compounds such as oxygen and carbon dioxide.

5 0
2 years ago
How can these objects all weigh the same but be different sizes?
Mrrafil [7]
Density/Earth’s gravitational pull.
5 0
2 years ago
How does the process of waste removal in a unicellular organism compare to the waste removal in a multicellular organism
Sonja [21]
The digestive system of multicellular is made up of several organs that work together to break down food so that it may be used in the body. Unicellular organisms have organelles, similar to organs, which help to digest food that will be used by the cell
6 0
3 years ago
Other questions:
  • The density of gold is 19.3 g/cm? What volume would 109 g of gold have?<br> ОА. .<br> 56.48 cm3
    9·1 answer
  • What is meant by first ionization energy?
    15·1 answer
  • An experiment was performed to determine how the amount of coffee grounds could affect the taste of coffee.The same kind of coff
    8·1 answer
  • In an exothermic reaction, heat can be considered a __________.
    14·2 answers
  • Which answer choice best describes why the results of Ernest Rutherford's gold foil experiment led him to propose the concept of
    12·2 answers
  • Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.
    9·1 answer
  • How many carbon atoms are in 6.5 moles of carbon?
    14·1 answer
  • 2. Al(OH),(s) + 3 HCl(aq) à 3 H2O(l) + AlCl3(aq). This reaction shows how aluminum hydroxide
    7·1 answer
  • Which of the following lists contain ONLY metals?
    14·1 answer
  • Suppose you boil an egg. What kind of change is taking place?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!