The head of a strike anywhere match contains tetraphosphorous trisulfide, P4 S3. In an expriment, a student burned this compound in an excess of oxygen and found that it evolved 3651 KJ of hea per mole of P4S3 at a constant pressure of 1 atm. she wrote the following thermochemical equation: P4S3(s) + 8O2 (g) --> P4O10(s)+3SO2. Calculate the standard enthply of formation of P4S3