What is the value of KC at 700K Chapter 15 Problem 1594 Enha

What is the value of KC at 700K?

Chapter 15 Problem 15.94 -Enhanced - with Feedback Constans emis dii.Table Part A At a temperature of 700 K the forward and reverse rate constants for the reaction 2H1(g) = H2(g)-12 (g) are k 1.8 x 10 SMsand k, 0.063 M-1 s-1 at is the value of the equilibrium constant Ke at 700 K? Express your answer to two significant figures ap You may want to reference Papes 622 663) Chapter 15 whie completing this bie problern Submit RequestAnswer oble Part B What is the value of the equilibrium constant Ke at 800 K if the rate constan have values of kf-0.097 M-1s-1 and k,-2.6 M s\' I? Express your answer to two significant figures ono Give Probl Submit Part C Back is the forward reaction in Part B endothermic or e the left column to the appropriate blanks in the sent astering Chemistry

Solution

The reaction is

2HI ---------> H2 + I2

Given

kf = 1.8x10^-3 M^-1s^-1

kr = 0.063 M^-1s^-1 at 700K

We know that the equilibrium constant Kc = kf/kr

Thus Kc = 1.8x10^-3 M^-1s^-1 / 0.063 M^-1s^-1

=0.0285 at 700K

Part B

At 800K

Kc = kf /kr

=0.097/2.6

=0.0373 at 800K