Direction: Use Hess Law in determining the change in enthalpy of the chemical reaction. Follow Performance Task: the steps that you have learned .Use the space for vour answer. Show your solution. SF4d Calculate the value of AH for the reaction: 2Sd. 20Fz ------ SOn + 1. Given the following reaction, Balance it first OF2 + H20 ------→ SF4D • 2H2Op -----→ • Oz O2 SO 2HF io 4HFD AH = -277 kJ AH = -828 kJ + + -----> AH = -297 kJ

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