If you point a hairdryer at an inflated balloon, it will expand.
Some of the heat energy goes into raising the temperature (making it hotter),
Some of the heat energy going into stretching the rubber (work is done to expand the balloon). This will increase the pressure on the inside.
The heat energy needed to raise the temperature is the enthalpy.
Had you done the hairdryer thing with a gas syringe, the plunger thingy could move (effectively) effortlessly, i.e. there would have been a change in volume, but not pressure, so all of the heat energy went into temperature change and so it was all enthalpy.
I hope no one tells me I'm wrong.