Mass and Energy Balance Exercise

One pound of steam at $275F$ has $80\%$ steam quality. How much heat will be released when it is allowed to condense at $190F?$

Saturated steam at $130C$ is required to heat $10kg$ of product $)=(3\mathrm{.}89k\frac{J}{k}gK$ from $25C$ to $135C$ and condensate is released at $35C.$ Calculate the quantity of the steam.

$1500kg$ milk with specific heat capacity of $4000\frac{J}{k}gK$ is heated from $10C$ to $70C,$ the heating efficiency is $0\mathrm{.}85.$ Steam is available at $520$kPa vapour pressure with $90\%.$ The condensate leaves the steam at $65C.$

In the formulation of a pudding mix, it is desired that the solids content of the product will be $20\%.$ The product leaving the batch tank has a temperature of $80F$ and is preheated to $195F$ by direct steam injection, using saturated steam at $220F$ followed by heating in a closed system to sterilizing temperatures. There is no further gain or loss of moisture in the rest of process. The specific heat capacity of the product is $0\mathrm{.}84BT\frac{U}{l}bF.$ Calculate the quantity of the steam.