The value of equilibrium constant, Kp for reaction \({CaCO}_{3({s})} \rightleftharpoons {CaO}_{({s})}+{CO}_{2({g})}\) is
1
\(\frac{{P}_{{CO}_2} \times {P}_{{CaO}}}{{P}_{{CaCO} 3}}\)
2
\({P}_{{CO}_2}\)
3
\(\frac{{P}_{{CaO}}}{{P}_{{CaCO}_3}}\)
4
\(\frac{{P}_{{CaCO}_3}}{{P}_{{CO}_2} \times {P}_{{CaO}}}\)