问题
选择题
根据盖斯定律判断如下图所示的物质转变过程中，正确的等式是( )
A．ΔH1＝ΔH2＝ΔH3＝ΔH4
B．ΔH1＋ΔH2＝ΔH3＋ΔH4
C．ΔH1＋ΔH2＋ΔH3＝ΔH4
D．ΔH1＝ΔH2＋ΔH3＋ΔH4
答案
答案：D
根据能量守恒定律可知，反应热与反应途径无关，所以ΔH1＝ΔH2＋ΔH3＋ΔH4，答案选D。
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根据盖斯定律判断如下图所示的物质转变过程中，正确的等式是( )
A．ΔH1＝ΔH2＝ΔH3＝ΔH4
B．ΔH1＋ΔH2＝ΔH3＋ΔH4
C．ΔH1＋ΔH2＋ΔH3＝ΔH4
D．ΔH1＝ΔH2＋ΔH3＋ΔH4
答案：D
根据能量守恒定律可知，反应热与反应途径无关，所以ΔH1＝ΔH2＋ΔH3＋ΔH4，答案选D。
My name is Alice. I’m 11 years old. I ____ a little sister. She’s 9 years old. ____ name is Kate. We have different habits(习惯). I like ______ TV very much. I like to watch ping-pong games ___ ___ TV. I think they’re fun. I like vegetables, such as carrots, ______ and so on. I also like apples and eggs. They’re good for us. Kate ______ running. She thinks it’s interesting. But I think they’re _____. Kate doesn’t like vegetables, ______ she likes French fries and ice cream. And she also likes hamburgers . I ______ think they’re healthy. So I don’t eat __ ___.
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