Which of the following statement correctly describes the studentās observation? CaO- calcium Oxide reaction with water is regarded as exothermic. A student mixes these two products in a test tube and touches its side surface.
A. The test tube becomes cold due to release of heat energy B. The test tube becomes hot due to release of heat energy C. The test tube becomes hot due to absorption of heat energy D. The test tube becomes cold due to absorption of heat energy
In a lab, the students or scientists must make observations from the experiments that they are conducting. When a student mixes chemicals in a lab, they may need to be aware of the results. Sometimes, explosions happen in laboratories because the chemicals that are mixed together should not be mixed together. In most cases, the scientist already knows this and will not mix the chemicals together.
Another result may be that the test tube becomes very hot or very cold based on the chemicals being mixed together. If a student mixed calcium oxide with water, it may make the test tube hot. The student may determine this simply by touching the test tube. If the mixture is hot, then the surface of the tube would be hot.