Substance X has a potential-energy minimum of at an internuclear distance of

CHEMISTRY · Single correct · AP · Chemistry · Compound Structure and Properties · Compound Structure and Properties

Problem

Substance X has a potential-energy minimum of

-350\,\text{kJ mol}^{-1}

at an internuclear distance of

140\,\text{pm}

. Substance Y is reported to have a bond that is

10\,\text{pm}

shorter and

50\,\text{kJ mol}^{-1}

stronger than that of X. Which pair of values most appropriately represents the position of the minimum of Y’s potential-energy curve? (a)

(150\,\text{pm},\;-400\,\text{kJ mol}^{-1})

(b)

(130\,\text{pm},\;-300\,\text{kJ mol}^{-1})

(c)

(150\,\text{pm},\;-300\,\text{kJ mol}^{-1})

(d)

(130\,\text{pm},\;-400\,\text{kJ mol}^{-1})