Gas Laws
A few examples of what you can ask Wolfram|Alpha about:
Ideal Gases
do an ideal gas law computation
determine characteristics of an ideal gas
determine the speed of sound for an ideal gas
calculate the heat capacity of an ideal gas
compute with the Sackur-Tetrode equation
compute heat capacity ratio
find the internal energy of ideal gases
find the Maxwell speed distribution of a gas
Nonideal Gases
find characteristics of a van der Waals gas