NH3 is an important molecule for a wide range of synthetic and agricultural applications. Under certain conditions, it can decomposed back into starting materials required for the Haber-Bosch process. 2 NH3 (g) = N2 (g) + 3 H2 (g) The following data are provided at 298 K:   NH3 (g)  N2 (g)   H2 (g) Change in Hf (in kJ mol-1)  -46 0 0 Change in Sf (in J K-1 mol-1)  193 192 131 1. Calculate change in Hrxno and change in Srxno for this reaction at 298 K. 2. Is this reaction endothermic or exothermic? Explain briefly 3. If the temperature is raised to 500 K, will this reaction shift to favour products or reactants? Explain 4. Using change in Hrxno and change in Srxno values calculated in part 1, find change in Grxno at 298 K.

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