Using the data provided, calculate the multiple bond energy $$(kJ mol^{-1})$$ of a $$C \equiv C$$ bond $$C_2H_2$$. That energy is (take the bond energy of a C-H bond as 350 kJ $$mol^{-1}$$)

$$2C(s) + H_2(g) \rightarrow C_2H_2(g)$$                          $$\triangle H = 225 kJ mol^{-1}$$

$$2C(s)  \rightarrow 2C(g)$$                                              $$\triangle H = 1410 kJ mol^{-1}$$

$$H_2(g) \rightarrow 2H(g)$$                                             $$\triangle H = 330 kJ mol^{-1}$$