@DrIanBailey okay fire away

@DrIanBailey sorry only just getting to grips with this I see you have posted some messages

@DrIanBailey Is it due to their double bonds? They are liquid already at room temp, therefore require less energy to boil.

@DrIanBailey do you mean what things look, smell like? What colour?

@DrIanBailey are you referring to change in temperature? Colour change? Rusting of metal?Change in state from frozen to liquid??