The Ideal Gas Law, represented as PV = mRT, is applicable to both isothermal and non-isothermal processes, including polytropic processes. It serves as an equation of state that relates pressure (P), volume (V), and temperature (T) under fixed amounts of gas. During a polytropic process, while the relationship PV^γ = constant holds, temperature (T) will vary as pressure (P) and volume (V) change, ensuring that the Ideal Gas Law remains valid.
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No. It is an equation of state: it relates P, V, and T (assuming n fixed). It is valid everywhere (you can't have an ideal gas at pressure ##P_1## occupying volume ##V_1##, and measure temperature ##T_1##, and have the same amount of an ideal gas also at ##P_1## and ##V_1## and measure ##T_2 \neq T_1##).SherlockOhms said:Is the ideal gas law, PV = mRT, only applicable to processes which are carried out isothermally?