36-37.5.0 grams of KCI (K = 39.1, CI = 35.45) is dissolved in 50 grams of water and the temperature changes from 20°C to 15°C. Calculate the heat gained/lost by
the water.
+1150 joules
-1150 joules
+1045 joules
-1045 joules

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

it is the most commonly accepted one

answer; 4 electrons;