What are the differences between isobutane and n-butane in terms of their properties and applications?

Isobutane and n-butane are both hydrocarbon gases, but they differ in their molecular structures. Isobutane has a branched structure, while n-butane has a straight chain structure. This difference affects their properties and applications. Isobutane has a higher vapor pressure and is more volatile than n-butane. It is commonly used as a refrigerant and in aerosol propellants. N-butane is often used as a fuel for portable stoves and lighters due to its lower vapor pressure and higher boiling point.