申論題

4. Find ihe mass (in kg) of 100 °C steam which must be mixed with 180 kg of 25 °C waler in order to make final liquid water temperature 100 °C. 1 leal losses during mixing amount to 2110 kJ. The latent heat of vaporization for water at 100 °C is 2252 lcJ/kg. [25 pis)