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The most obvious event to look for to indicate a chemical reaction is the production of heat. All chemical reactions produce heat.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoThere should be physical changes such as a color change, increase or decrease in temp, or formation of solid, liquid, or gas.
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What does a negative H tell you about a reaction?
yes
What is different about atoms after redox reaction has happened?
the oxidation states have changed
How can you tell that a chemical reaction occurred from the copper sulfate?
You have to notice what happens during the reaction and what products have been obtained.
How do you tell how fast a chemical reaction will take?
Only after the measurement of the reaction rate. See the link below for details.
What happened when acetaldehyde reacts with hydrogen cyanide?
The reaction is:C2H4O + HCN = C3H5NO
What is a chemicall reaction?
A chemical reaction is a reaction in which a substance is turned into another completely different substance
How can you tell for sure that a redox reaction has happened?
if oxidation states change, it is a redox reaction
When did Thermidorian Reaction happen?
Thermidorian Reaction happened in 1794.
What does h tell about a reaction?
The reaction is exothermic.
What happened to the rate of a reaction as the reaction progresses?
In general, and depending on the order of the reaction, the rate will decrease as the reaction progresses.
What does a positive H tell about a reaction?
The reaction is endothermic.
What does a negative deltaH tell about a reaction?
the reaction is exothermic
What does a negative H tell about a reaction?
The reaction is exothermic.
What is your reaction about the monkey and the turtle?
You are the only person who can tell YOUR reaction.
What will tell you the efficiency of a chemical reaction?
You need to calculate the yield of the reaction.
What does a positive delta H tell about reaction?
This is an endothermic chemical reaction.
How can you tell the difference between an endothermic and exothermic reaction?
You can generally tell by changes in temperature, whether you have an exothermic reaction which produces heat, or an endothermic reaction which consumes heat.
