$407.$ The ratio of equilibrium constants $($Kp$2/$Kp$1)$ at two different temperatures is given by

$($R$/$H$)(1/$T$1-1/$T$2)$

$($H$/$R$)(1/$T$1-1/$T$2)$

$($H$/$R$)(1/$T$2-1/$T$1)$

$(1/$R$)(1/$T$1-1/$T$2)$