Write your answers on this paper in the space prov I do not like to get extra at

Question

Write your answers on this paper in the space prov I do not like to get extra attached sheets of paper. Multiple Choice (18 3 pts each 54) A 1. Which is not correct about the rate of a chemical reaction? It a. can be determined from the balanced chemical equation b. depends on the manner in which two reactants collide. c. depends on the concentrations of the reactants d. increases with increasing temperature e. details the exact steps in the reaction 2. Which of the following statements about catalysts is False? a. It lowers the activation energy. b. It changes the heat of the reaction. c. A catalyst uses a different mechanism. d. A catalyst must be regenerated at the end of the reaction. A 3. The most common rate equations used in chemical kinetics is a. first order b. second order c. pseudo-first order d. higher orders 4. Given the equation N2 + 3H2 2NH3, if hydrogen is reacting at a rate of 0.074 M/s, at what rate is the nitrogen reacting? a. 0.074 M/s b. 0.037 Ms c. 24.6 M/s d. 0.148Ms 5. Which of the following is a hypothetical high energy molecule in a reaction diagram that includes both bond making and bond breaking? a. Activation Energy b. an intermediate d. product c. reactant e. activated complex 6. LeChatlier's Principle predicts that addition of carbon dioxide gas will do which of the following in the reaction shown? c. it will shift the a. It will form more H' b. it will form more water equilibrium to the right d. it will increase the K 7. In the combustion of methane, CH4(g) + 2 O2(g) CO2o)+ 2 H2O(g), which reactant has the greatest rate of disappearance? a. CHs b. O2 c. CO2 d. H2O e. CH4 and O2 have the same rate of disappearance.

Explanation / Answer

For Question Number 1.) Option A is the Right answer;

The main factors that affects the rate of reaction are

(1.)temperature --> Increasing temperature increases reaction rate.( 2.)Pressure --> Increasing pressure increases reaction rate (3.) Concentration-->increasing the amount of reactants increases the reaction rate(4.)Catalyst--> catalyst lowers activation energy, increase reaction rate.(5.)Surface area -->Increasing the surface area of a solid reactant increases the reaction rate.

For Question Number 2.) Option B is the Right answer;

Catalysts reduce the activation energy of a reaction, by providing an alternative reaction pathway. As the activation energy is reduced, more reactant particles have requisite energy to combine effectively, and the reaction rates increases. Catalysts do not alter heat of the reaction.

3.) Answer is A

4.) Answer is B

5.) Answer is C as with conversion of reaction the rate and concentration of reaction will increases.

6.) Answer is B

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