断开1mol H一H键、1mol N一H键、1mol N≡N 键分别需要吸收能量为436kJ、391kJ、946kJ，求：H₂与N₂反应生成0.5molNH₃填____ （“吸收”或“放出”）能量____ kJ．

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We Both Like Music

    My name is Frank White. I'm fourteen years old. I was born on May 13th, 1999. Mike is my good friend. His birthday is May 15th. He is only twelve years old now. Every year on May 14th, we have a birthday party together(一起) at our school. Many friends come to our party. We all have a good time at the party. We both like music. We often have a pop concert. I play the guitar. He plays the drums. Mike often sends me some CDs and I often send him tickets for concerts.