The standard enthalpies of n-pentane, isopentane and neopentane are `-35.0, -37.0` and `-40.0` K.cal/mole respectively. The most stable isomer of pentane of pentane in termsof energy is

The melting points of n-pentane (I), isopentane (II) and neopentane (III) increase in the order:

Arrange n-pentane, isopentane and neopentane in the descending order of dispersion forces.

Delta Hc^(-) (the standard enthalpy of combustion) of butane and 2-methyl propane is -2877.0 and -2868.0 kJ mol^(-1) , respectively. Explain the relative stabilities of the two isomers.

Delta Hc^(-) (the standard enthalpy of combustion) of butane and 2-methyl propane is -2877.0 and -2868.0 kJ mol^(-1) , respectively. Explain the relative stabilities of the two isomers.

The heat of hydroggenation for 3-methylbutene and 2-pentene are 30-kcal/mol and -28kcal/ mol respectively . The heats of combustion of 2-methylbutane and pentane are -784 kcal/mol and -782 kcal /mol respectively. All the values are given under standard conditions. Taking into account that combustion of both akanes give the same products, what is DeltaH (in kcal.mol)n for the following reaction under same conditions ?

The standard heat of formation of NO_(2)(g) and N_(2)O_(4)(g) are 8.0 and 4.0 kcal mol ^(-1) respectively. The heat of dimerisation of NO_(2) in kcal is

The standard heat of formation of NO_(2)(g) and N_(2)O_(4)(g) are 8.0 and 4.0 kcal mol ^(-1) respectively. The heat of dimerisation of NO_(2) in kcal is