Here's why:
* Hydrocarbons: Butene is a hydrocarbon, meaning it's made up of only hydrogen and carbon atoms.
* Molecular Weight: The molecular weight of butene is relatively low (56 g/mol).
* Intermolecular Forces: Hydrocarbons have weak intermolecular forces (van der Waals forces). These weak forces don't hold the molecules together strongly enough to make them a liquid or solid at room temperature.
However, it's important to note that butene can be liquefied by:
* Cooling: Lowering the temperature of butene will decrease the kinetic energy of the molecules, allowing them to condense into a liquid.
* Pressurizing: Increasing the pressure on butene will force the molecules closer together, increasing the strength of the intermolecular forces and leading to liquefaction.
