I am grilling in my backyard and suddenly, my propane tank explodes. $($a$)$ How big is my cloud of propane after it is released to the atmosphere $($it is $25$ degrees C outside today$)?($b$)$Unfortunately$,$ this occurred as I was trying to light my grill, the propane combusts and yields a fireball that consists of CO$2$ and H$20$ vapor $($propane burns in air at $1980$ degrees C$).$ How big is the fireball? Assume this is a standard $20$ lb propane tank with $125$ psi pressure.