1. Above what temperature is it impossible to liquify this substance, no matter what the pressure? 2. At a constant temperature, what would you do to cause this substance to change from the liquid phase to the solid phase?

C) the increase in atmospheric pressure pushes the walls of the balloon outward thus making it  is the answer.hope i you.

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.