$$

$6.$ Evaporation of a Sugar Solution in a Double$-$Effect Evaporator. A double$-$effort evaporator with reverse feed is used to concentrate $4536k\frac{g}{h}$ of a $10wt\%$ sugar solution to $50\%.$ The feed enters the second effect at $37\mathrm{.}8C.$ Saturated steam at $115\mathrm{.}6C$ enters the first effect and the vapor from this effect is used to heat the secEnd effect. The absolute pressure in the $\frac{W}{m^2}*K.$ The heating areas for both effects $$ e equal. Use boiling$-$point$-$rise ant.