Please choose the correct answer to the question: A recycling plant manager needs to melt 1500 kg of scrap copper to sell to a wire manufacturer. The copper is at 15°C and its melting point is 1083°C. The copper has a specific heat of 385 J/kg x K. How much heat is required to raise the temperature of the copper to its melting point?

Answer1: 6.2 x 10^8 J Answer2: 6.3 x 10^8 J Answer3: 7.7 x 10^8 J Answer4: 7.9 x 10^8 J

Answer format: answer1/answer2/answer3/answer4