单句改错。

1. Restaurant owners should know how to make customers to spend more money.

    __________________________________________________

2. People only sit for about 20 minutes after they leave.

    __________________________________________________

3. For times an ad can lead you to buy something you don't need at all.

    __________________________________________________

4. Sometimes we can be cheated by the ads for they are very confused.

    __________________________________________________

5. His rudeness made me very annoying.

    __________________________________________________

煤炭可以转化为清洁能源和化工原料．

（1）用煤可以制得水煤气，其反应的化学方程式为______．

（2）已知一氧化碳与水蒸气反应过程的能量变化如图所示，则此反应为______（填“吸热”或“放热”）反应，反应的热化学方程式为______．

（3）已知 1mol C 完全转化为水煤气时吸收热量 131.5kJ，则1mol C与CO₂反应生成CO______（填“吸收”或“放出”）热量______kJ．