Construct a 3-5 step problem for a substance of your choice. Find the energy in kilojoules for 10.0 grams of the substance. Do not use water or ethyl alcohol (any other element or compound may be...

75098 Assignment
Phase changes
Here we are going to consider Benzene as the element for phase changes.
Benzene has melting point at 5.5 degree celcius and when melted it is endothermic reaction.(so delta H is positive)
Here delta Hfusion for benzene is 9.5 KJ/mol.
However, the quantity of benzene given is 10 gms and hence we have to convert gms to moles.
Benzene molar weight is 78.11 g/mol.
Hence we get loss of energy as
10 gm *(1 mol Benzene/78.11 g/mol)*9.5...