Chemical reactions Flashcards
What is a chemical reaction?
noun
a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
What is the conservation of mass?
It is a theory were atoms are not created nor destroyed
What are observations that a chemical reaction has occurred?
When there’s a change like color or tempature.
What is the difference between physical and chemical change?
There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn’t change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
What is percipitate?
cause (a substance) to be deposited in solid form from a solution.
What does catalyst mean and what does a catalyst do❓❓
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
And Catalysis. A catalyst speeds up a reaction by lowering the activation energy required for the reaction to proceed. To reiterate, catalysts do not affect the equilibrium state of a reaction.
What does endothermic do?
Endothermic gives out energy.
What is exothermic?
(of a reaction or process) accompanied by the release of heat.
(of a compound) formed from its constituent elements with a net release of heat.
