Question

The standard enthalpies of n-pentane, isopentance and neopentance are -35.0, -37.0 and -40.0 K. cal/mole respectively. The most stable isomer of pentane in terms of energy is:

• A. n-pentane
• B. iso pentane
• C. neo pentane
• D. n-pentane and iso pentane both

Answer 1

The correct option is C neo pentane

stability $\alpha \frac{1}{energy}$

$\therefore$ neopentane is most stable having least energy.