Sulfur dioxide and oxygen undergo reaction in the gas phase. $2\text{SO}_2(g) + \text{O}_2(g) \\rightleftharpoons 2\text{SO}_3(g) \\qquad \\Delta H = -197\\,\\text{kJ mol}^{-1}$ Which of these statements are correct?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct