The $$standard atmosphere$($seen below$)$ is an idealized representation of the mean conditions of the earth$$s atmosphere. It gives you information about temperature and pressure at different elevations above the earth. Assuming an ideal atmosphere, at what elevation does water boil at $40?$ Use the vapor pressure of water from Table B$2$ in the Munson book for the given temperature and find the altitude or elevation $($in km$)$ from the given chart by interpolation.