How much water must be evaporated in the standard room for paper testing when the temperature is set to $22$ C and the humidity is $50\%.$ The initial temperature is $22$ degrees, but the humidity is only $20\%.$ The dimensions of the room are $7$m x $5$m x $2\mathrm{.}5$m$.$ You can use $1\mathrm{.}2$ kg$/$m$3$ as the density of air.