What is true for the energy involved in an explosion?
there is more energy at the end of the explosion than there is at the beginning.
there is less energy at the end of the explosion than there is at the beginning.
there is the same amount of energy at the end of the explosion than there is at the beginning.< < < my answer
the amount of energy before and after the explosion depends on the type of reaction.
can someone check it?

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

the answer is d. 74.02