Question

In the reaction A(g)→2B(g)+C(g),
the total pressure increases while the partial pressure of A(g) decreases. The initial pressure of A(g) in a vessel of constant volume is 6.900×103 mmHg .

A What will be the total pressure when the reaction has gone to completion?
Express your answer to four significant figures and include the appropriate units.

B What will be the total gas pressure when the partial pressure of A(g) has fallen to 8.10×102 mmHg ?
Express your answer to four significant figures and include the appropriate units.

Answer 1

Answer:

that is a.b like this or one question

Answer 2

Given:

Initial gas pressure of A(g) in container at constant volume is $6900 mmHg$

To Find:

Total gas pressure when the reaction gone on completion ?

Total  pressure when pressure of A(g) fallen to $810 mmHg$ ?

Solution:

If Reaction occur at constant temp. and pressure

We represent partial pressure values in molar quantities

A(g)→2B(g)+C(g)

Initial Reactant $P_{A}$ = 6900

Then

$P_{B}$ = 2 × 6900 = 13800

$P_{C}$ = 6900

Total = $P_{B}+P_{C}$ = 20700

Reaction reached before the completion

Reactant consumed $P_{A}$ = 6900- 810 =6090

Then

$P_{A}$ = 810

$P_{B}$ = 2 × 6090 = 12180

$P_{C}$ = 6090

Total gas pressure = 19080