Avessel contains a gaseous mixture of composition by volume 70% hydrogen and 30% carbon monoxide. it is desired that mixture should be made in the proportion of 60% hydrogen and 40% carbon monoxide by removing some hydrogen and adding some carbon monoxide. calculate per kilomole of mixture to be removed and tbe carbon monoxide to be added.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?