题目

Bamboo (竹子) is one of nature’s most surprising plants. Many people call this plant a tree, but it is a kind of grass. Like other kinds of grass, a bamboo plant may be cut very low to the ground, but it will grow back very quickly. A Japanese scientist reported one bamboo plant which grew 1.5 meters in 24 hours! Bamboo grows almost everywhere in the world except Europe. There are more than 1, 000 kinds of bamboo. Not all bamboo looks the same. Some bamboo plants are very thin. They may only grow to be a few centimeters wide while others may grow to more than 30 centimeters across. This 3．已知：①H2O（g）═H2O（l）△H=-Q1kJ．mol-1 ②C2H5OH（g）═C2H5OH（1）△H=-Q2kJ．mol-1 ③C2H5OH（g）═302（g）=2C02（g）+3H20（g）△H=-Q3 kJ．mol-1 下列判断正确的是（　　）A．酒精的燃烧热AH=-Q3 kJ•mol-1B．由③可知1molC2H5OH（g）的能量高于2molC02（g）和3 molH20（g）的总能量C．H20（g）→H20（ 1）释放出了热量，所以该过程为放热反应D．23g液体酒精完全燃烧生成C02（g）和H20（ 1），释放热量为（0.5Q3-0.5Q2+1.5Q1）kJ