Physical Chemistry Answers

In the phase diagram of water.What is upper limit of liquid-vapour equilibrium line?

Using the “double the first half-life” method, determine the order of the

reaction.

At a certain temperature and a total pressure of 10^6 Pa iodine vapour contains 40% by volume of 1atoms

I2(g -2l(g)

a) Calculate Kp for the equilibrium

b) At what total pressure (without temperature change) would the % of 1atoms be reduced to 20%

 For the reaction 2NO2Cl → 2NO2 + Cl2 , concentration of NO2Cl and time are measured as a reaction proceeds. The data were recorded in the table. (10 Marks)

Time/ s

60

150

225

450

900

[NO2Cl]/ M

0.500

0.416

0.336

0.287

0.201

0.127

(1) Express the rate of the reaction with respect to each of the reactant and product.

(2) Using the “double the first half-life” method, determine the order of the reaction.

how does the solid substance affect the mass of solid dissolves?

Explain the terms-the number average molar mass and the mass average molar mass of a pl

Polymer giving suitable expressions for them.

1. For the reaction 2NO2Cl → 2NO2 + Cl2 , concentration of NO2Cl and time are measured as a reaction proceeds. The data were recorded in the table. (10 Marks)

Time/ s

60

150

225

450

900

[NO2Cl]/ M

0.500

0.416

0.336

0.287

0.201

0.127

(a) Express the rate of the reaction with respect to each of the reactant and product.

(b) Using the “double the first half-life” method, determine the order of the reaction.

If the proposed mechanism for the reaction is:

i. I2 → 2 I fast

ii. 2 I → I2 fast

iii. H2 + 2I → 2 HI slow

(a). Identify intermediate for the reaction.

(b). Derive the rate law for the reaction.

Calculate the enthalpy change at 298 K for the cell reaction Zn ZnCI, (0-1 M), AgClis)|Ag

Given that E, is 0:8 V and at 298 K is - 4-0 x 10+ VK-

What is a well behaved function? Illustrate using a suitable diagram