A vessel at 1000 K contains carbon dioxide with a pressure of 0.5 atm. Some of carbon dioxide is converted into carbon m…

A vessel at 1000 K contains carbon dioxide with a pressure of 0.5 atm. Some of carbon dioxide is converted into carbon monoxide on addition of graphite. If total pressure at equilibrium is 0.8 atm, then \({\mathrm{K}}_{\mathrm{p}}\)is