A porous carbon diaphragm 1in(25.4mm) thick of average pore diameter 0.01cm permitted the flow of nitrogen at the rate of 9.0ft3 (measured at 1stdatm,80F)/ft2min(0.0457m3/m2s,26.7C ) with a pressure difference across the diaphragm of 2inH2O(50.8mmH2O). The temperature was 80F and the downstream pressure 1stdatm. Calculate the flow to be expected at 250F(121C) with the same pressure difference. Pt=10133PaMN2=28.02R=8314gc=1=1.8105kg/msat26.7C(300K)