At which step(s) pictured on the graph below, does the temperature remain constant?

Option D. Condensation

Explanation:

Condensation is the proces in which gaseous molecules are converted into liquid. During condensation, the temperature remains constant as there is no change in kinetic energy of the gaseous molecules.

From the graph given above, we can see that the temperature at the Gas – Liquid remains the same. At this state, condensation occurs as the gas molecules are converted into liquid.

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