under what conditions do most gases behave ideally?
a. at all temperatures and pressures
b. at high temperatures and pressure above 10 atm
c. at extremely low temperature and low pressure
d. at low temperature and high pressure
e. at high temperature and low pressure

Answer : The correct option is, (e) at high temperature and low pressure

Explanation :

The conditions for ideal gas are :

Ideal gas are those gas that has no intermolecular attractions.

Ideal gas are those gas that have negligible volume.

The ideal gas equation is,

The conditions for real gas are :

Real gas are those gas that have intermolecular attractions.

Real gas are those gas that have volume.

The real gas equation is,

A real gas behave ideally at high temperature and low pressure condition.  Or we can say that most of the gases behave ideally at high temperature and low pressure condition.

Hence, at high temperature and low pressure the most of the gases behave as an ideal gas.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.