How much energy would it take to explode the Earth?

This is equal to the total gravitational potential energy of the Earth or about 2.5 x 10^39 ergs. Since the Sun puts out 4 x 10^33 ergs/sec you would need as much energy delivered to the core of the Earth as the Sun produces in 1 million seconds or 11 days! This would 'dissipate the mass of the Earth to infinity'.