一、对两种常识性问题的解析1.把一小块冰放在0℃的水中,另一小块冰放在0℃的盐水中,各有什么现象?为什么?解析冰放在水中,冰水共存,冰不会熔化;冰放在盐水中,冰会熔化。原因是水的凝固点为0℃,0℃的水冰可以共存。但盐水的凝固点低于0℃,0℃的冰可以变成0℃的水,冰熔化吸热,盐 First, the analysis of two common-sense questions 1. Put a small piece of ice in water at 0 ℃, the other a small piece of ice on the salt water at 0 ℃, what are the phenomena? Why? Analytical ice on the water, Coexistence of ice water, the ice will not melt; ice in the salt water, the ice will melt. The reason is that the freezing point of water is 0 ℃, 0 ℃ water ice can coexist. However, the freezing point of brine is below 0 ° C. Ice at 0 ° C can become water at 0 ° C, and ice melts to absorb heat. Salt