To calculate the specific volume of nitrogen in cubic meters per kilogram at various temperatures and pressures, the ideal gas law PV=nRT can be utilized. Given pressure (P) and temperature (T), the gas constant (R) is fixed, so the focus should be on determining the number of moles (n) for 1 kg of nitrogen. Converting the mass of nitrogen to moles is essential for the calculation. This method allows for accurate specific volume determination under different conditions. Understanding these principles is crucial for scientists working with nitrogen gas.