A 0.10m3 gas tank holds 5.0 moles of nitrogen gas (N2), at a…

A 0.10m3 gas tank holds 5.0 moles of nitrogen gas (N2), at a temperature of 370K.  The atomic mass of nitrogen is 14 g/mol, the molecular radius is 3.0 × 10-10 m, and the Boltzmann constant is 1.38 × 10-23 J/K. What is the root-mean-square speed (thermal speed) of the molecules?

A 610-g quantity of an ideal gas undergoes a reversible isot…

A 610-g quantity of an ideal gas undergoes a reversible isothermal compression at a temperature of 330K.  The compression reduces the volume of the gas from 0.40 m3 initially, to 0.21m3 finally. The molecular mass of the gas is 33.0 g/mol, and the ideal gas constant is R = 8.314 J/(mol ∙ K). What is the entropy change for the gas for this process?