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Calculate the standard enthalpy of forma...

Calculate the standard enthalpy of formation of `SO_3` at 298 K using the following reactions and enthalpies.
`S_(8)(s) + 8O_2(g) to 8SO_2(g), DeltaH^(@) = -2775 kJ mol^(-1)`
`2SO_(2)(g) + O_(2)(g) to 2SO_(3)(g), Delta H^(@) = - 198 kJ mol^(-1)`.

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To calculate the standard enthalpy of formation of \( SO_3 \) at 298 K using the given reactions and their enthalpies, we can follow these steps: ### Step 1: Write down the given reactions and their enthalpy changes. 1. \( S_8 (s) + 8 O_2 (g) \rightarrow 8 SO_2 (g) \) \(\Delta H_1 = -2775 \, \text{kJ/mol}\) 2. \( 2 SO_2 (g) + O_2 (g) \rightarrow 2 SO_3 (g) \) ...
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