Questions and Answers - Water Equivalent

?10g of water at 30°C is taken in a vessed of mar 200g. 20g of water at 10°C is pored into this we vess el. Find final temperat- are of the mixture? (speci- fic heat capacity (5) Of ve- ssel = 0.425/gic ) 209 water ans: at 10°C mas hotbo dy vesselar wateral - 80°C cold box 80°, 10g 10°C water Find tempt PH lost = QVL + QWL =200x0.42 = (80-T) +10x4.2 x (80-T)= 20x4.2(T-10) =2( 80 T) t (80 = 2 (T-10) By 3 (80-7)=2 (7-10) = 240-37=27-20 260-57 T= 260 =52°C 5

1 49kg of cocter at 20°C is beawed to 50t using a beater of power 100w find the time for heaving? ans: PH aw P. 100cu Pt H=Pxt = 1006 Q MSAT 446200130= 1006 = 12x420 = soursecond ? hater is farsing from a height 100m and its half of the energy is converted into heat Then what is the change in temperature of water? mettern ans: Q = mgh SIGNATURES anama 2 P. of mgh a MSAT 2 gh In AT 2x5 AT. 10x100 2x 4200 10 89 19 2 -0.17CA