A vessel at `1000 K` contains carbon dioxide with a pressure of `0.5 atm`. Some of the carbon dioxide is converted to carbon monoxide on addition of graphite. Calculate the value of `K_(p)` if total pressure at equilibrium is `0.8 atm`.

Options

A. 1.8 atm
B. 3 atm
C. 0.3 atm
D. 0.18 atm

Answer

A

Explanation

`CO_(2)(g) + C(s) rarr 2CO(g)`
Now, `0.5-P+2P = 0.8 implies P = 0.3`
`K_(p) = P_(CO)^(2)/P(CO_(2)) = (2p)^(2)/ 0.5-p = 0.6^(2)/0.2 = 1.8`