Question

In: Chemistry

A. If the rate law for the reaction 2A + 3B products is first order in...

A. If the rate law for the reaction

2A + 3B products

is first order in A and second order in B, then what is the rate law?

B. A reaction was found to be third order in A. If the concentration of A is increased by a factor of 3, Then how much the reaction rate will be affected?

C. The overall order of a reaction is 2. What will be the unit of the rate constant? Show calculation.

D. A compound decomposes by a first-order process. If 25.0% of the compound decomposes in 60 minutes, what is the half-life of the compound?

E. What is the frequency factor in the Arrhenius equation?

Expert Solution

A. If the rate law for the reaction

2A + 3B products

is first order in A and second order in B, then what is the rate law?

keep elementary rate:

RATE = -k*[A]^a [B]^b

a = 1 and b = 2 then

RATE = -k*[A] [B]^2

B. A reaction was found to be third order in A. If the concentration of A is increased by a factor of 3, Then how much the reaction rate will be affected?

the rate will be affected

[3A]^3 = 3^3 = 27 times faster!

C. The overall order of a reaction is 2. What will be the unit of the rate constant? Show calculation.
rate = -k*C^2

rate = mol/L-s

C = mol/L

then

mol/L-s = k * (mol/L)^2

L/mol-s = k

D. A compound decomposes by a first-order process. If 25.0% of the compound decomposes in 60 minutes, what is the half-life of the compound?

half life is given as

0.693/k

we need to find k

log(A0/A) = kt/2.303

substitute for 0.25

log(1/0.75) = k*(60/2.303)

k = log(1/0.75) *(60/2.303) = 3.255025

then

HL = 0.693/k = 0.693/3.255025 = 0.212901 minutes

E. What is the frequency factor in the Arrhenius equation?

is a factor that corrects all interactions between molecules

queen_honey_blossom answered 2 years ago

Consider the following reaction: 2A+3B→3C+2D Use the following data to determine the rate of reaction in...

Consider the following reaction: 2A+3B→3C+2D Use the following data to determine the rate of reaction in terms of the disappearance of reactant A at time = 20 s. Time (s) 0 20 40 [A](M) 0.0400 0.0240 0.0180 Part B::Consider the following reaction: 2A+3B→3C+2D Use the following data to determine the rate of reaction in terms of the appearance of product C when the time is 20 s. Time (s) 0 20 40 [C](M) 0.000 0.0240 0.0480 Part C: Consider the...

1. The equilibrium constant for the reaction 2A ⇌ 3B is 2.3. If the initial concentrations...

1. The equilibrium constant for the reaction 2A ⇌ 3B is 2.3. If the initial concentrations of A and B are [A] = 0.10 M and [B] = 0.050 M, which of the following statements is true? A. The reaction will proceed to the left because Q > K. B. The reaction will proceed to the right because Q > K. C. The reaction will proceed to the left because Q < K. D. The reaction will proceed to the...

) Consider the reaction A à products. The rate law for this reaction is rate =...

) Consider the reaction A à products. The rate law for this reaction is rate = k[A] where k=7.02 ´ 10-3 M-1 s-1 at a particular temperature. If the initial [A] = 0.0500 M, what is the initial rate? What is the value of the half-life for this initial concentration of A? What will be the half-life if the initial [A] = 0.0250 M What will be the half-life if the initial [A] = 0.100 M What will be the...

What is the rate law for the reaction? What is the reaction order?

What is the rate law for the reaction?What is the reaction order?What is the value of the rate constant, k?

1. What is the overall reaction order for the reaction that has the rate law: Rate...

1. What is the overall reaction order for the reaction that has the rate law: Rate = k[H2] [NO]2 ? a. zero order b. first order c. second order d. third order 2. The first-order decomposition of hydrogen peroxide occurs according to the equation 2 H2O2(aq) ? 2 H2O(l) + O2(g) Using data from a concentration-time study of this reaction, which plot will produce a straight line? a. 1/[H2O2] versus time b. ln[H2O2] versus time c. [H2O2]2 versus time d. ...

The reaction 2A →B is second order in A with a rate constant of 35.1 M−1...

The reaction 2A →B is second order in A with a rate constant of 35.1 M−1 · s−1 at 25°C. (a) Starting with [A]0 = 0.00781 M, how long will it take for the concentration of A to drop to 0.00180 M? s (b) Calculate the half-life of the reaction for [A]0 = 0.00781 M. s (c) Calculate the half-life of the reaction for [A]0 = 0.00269 M. s 2. Given the same reactant concentrations, the reaction CO(g) + Cl2(g)...

The reaction 2A + B → C obeys the rate law –rB = kCB2, where k...

The reaction 2A + B → C obeys the rate law –rB = kCB2, where k = 0.25 L/mol.s at 75˚C. A is available as a 1.5 M solution and B as a 1 M solution. a) A 26 L/s stream of solution A and 30 L/s stream of solution B are combined just before being introduced into a CSTR. If a 150 L reactor is available, how many mole/h of C could be produced? b) You receive some financing...

Define and differentiate between the terms reaction rate, rate expression, rate law, reaction order, and instantaneous...

Define and differentiate between the terms reaction rate, rate expression, rate law, reaction order, and instantaneous rate law.

1)A reaction(A-products) is found to be first order with a rate constant of 2.97*10^-3 / min....

1)A reaction(A-products) is found to be first order with a rate constant of 2.97*10^-3 / min. What is the half life for this reaction? 2) If the reaction described in probrem 1 starts with an initial concentration of 1.00M of reactant A, What is the concentration of A after 300min? 3) What is the reaction oreder and what is the value of the rate constant? IN(H2O2) y=0.00835x-0.00493 1/H2O2 y=0.00460x-0.847 H2O2 y=-0.000264x+0.841

Module 3b Marx called the law of the tendency of the rate of profit to fall...

Module 3b Marx called the law of the tendency of the rate of profit to fall (LTRPF) the most important law of capitalist political economy. Why do you think Marx made that claim? (75- 100 words)