Explanation:
The boiling points of methane, propane and butane are listed below:
Methane
Propane
Butane
The average winter temperature in Alaska ranges from to. On a normal winter day, butane is a liquid as it has a comparatively high boiling point of. In case of coldest winter days, when temperature can be as low as or lower, propane becomes liquid. So, it’s become useless as fuel. But methane possesses a very low boiling point of. So it would always remain as gaseous no matter how low the outdoor temperature is, because is not achievable in earth atmosphere. So, methane is most suitable fuel to store in outdoor tanks during winter in Alaska.
