Heat of fusion: Hf = 334 J/g, Q = m. Hf Heat of vaporization: Hv = 2260 J/g, Q = m. Hv
2.1 J/g˚C Heat capacity (S) of solid water Q = m. S. ΔT
2.03 J/g˚C Heat capacity (S) of water vapor Q = m. S. ΔT
4.18 J/g˚C Heat capacity (S) of liquid water Q = m. S. ΔT

Please show all your work (five steps) to get full credit for this part.

1. How much energy (in KJ) is required to convert 50.0g of ice at – 30 ˚C to
steam at130˚C.

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

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