States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
![Use the following diagram for questions 8 and 9
8. The activation energy is represented by
1. A
2. B
3. C
4. B-A
5. B-C
9.
The enthalpy of the reaction is represented by
B- (C-A)
4. B-C
2. E
5. A- (B-C)
3. С-А
1.
Use for questions 10-12
A+BOC
The following are possible rate laws for the hypothetical reaction given above.
A.)
Rate - k(A)
B.)
Rate = k(A)^2
Rate = k(A)(B)
C.)
D.)
Rate - k(A) 2(B)
E.)
Rate = k(A)^2(B)^2
10.
This is the rate law for a first order reaction.
11.
This is the rate law for a reaction that is second order with respect to B.
12. This is the rate law for a third order reaction.
13. Consider the reaction
2N¿O; + O; D 4NO;
Which of the following statements is correct?
A. It is first order in N;Os
B. It is second order in N2O3
C. It is third order overall
D. It is both B and C
E. the order of the reaction cannot be predicted without more information
14. For the reaction N; + 3 H; D 2 NH,
A catalyst is required. Addition of the catalyst:
lowers the activation energy
produces more H2 for the reaction
A.
В.
C.
changes AH for the reaction
D.
does none of the above](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F001a30e7-82ae-4fd9-8c10-f81ad53ce881%2F9e97bf16-dc47-49f6-8d1a-d6ac4512da42%2Fdklz441d_processed.jpeg&w=3840&q=75)
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