As a 1-gram sample of H2O(1) changes to H2O(g)
at 100°C, the potential energy of the molecules
A. decreases
B.
increases
C. remains the same

Option B

Explanation:

Changing of a substance from liquid to a gas, is known as vaporization. During vaporization a substance absorbs thermal energy. The forces between particle is very weak and hence they gain potential energy. Thus, while changing from liquid to gas, energy gets absorbed to increase the potential energy. This energy is known as latent heat of vaporization.

Hence, option B is correct

i think so it’s will be b yes i believe its

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