If a
10.0 L sample of a gas at 25°C suddenly had its volume doubled, without
changing its temperature what would happen to its pressure? What could be done to keep the
pressure constant without changing the temperature?
1. The pressure would double; nothing
else could be done to
prevent this.
2. The pressure would double; the
moles of gas could be doubled.
3. The pressure would drop by ½; the
moles of gas could be halved.
4. The pressure would drop by ½; the
moles could be doubled.