# Tag Info

If you look at Text equation 1.29, the 492/620 is Temperature in Rankine. $$T°F = T°R - 459.67$$ Ice point is 491.67°R. 160°F = 619.67°R. If you do the math, it does not equal 0.0641, because the 369 is wrong. The math to get 0.0641 means 369 should be 359. 1 lb-mole of an ideal gas at 0°C and 1 atm occupies 359 $ft^3$ absolute. The molecular weight of air ...