For an ideal gas, the equation of state is given by which of the following?

Solution

1. The ideal gas law is the fundamental equation of state for a hypothetical ideal gas.
2. The relationship is defined by the variables pressure ($P$), volume ($V$), amount of substance in moles ($n$), the universal gas constant ($R$), and absolute temperature ($T$).
3. The mathematical expression relating these variables is $PV=nRT$.
4. Hence the answer is (A).