EAS Mixing baking soda with vinegar causes a chemical change. What is the evidence that chemical energy has been released during this process?

The color of the mixture looks white.
The baking soda and the vinegar disappear.
The vinegar and baking soda form a mixture.
The temperature of the mixture changes.

Which statement is actually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.