Introduction to Chemical Reactions Answers

For a science project, Janet performs four experiments that are supposed to show a chemical reaction. She displays her results in a table.

Which of these most likely represents a chemical change?

Cherylanne mixes together Chemical A and Chemical B in a test tube, forming Chemical C. The mixture instantly turns cool to the touch. She then adds Chemical D, and the reaction becomes hot and explodes.

When vinegar and baking soda react, the mixture becomes cold to the touch and a gas and a new liquid substance are formed.

Two chemicals react in an endothermic reaction. What can be known about this reaction?

Which is an example of a chemical reaction?

When baking soda and vinegar react, the surface bubbles. What does this most likely indicate?

A Venn diagram is used to compare and contrast different topics. The items that are unique to each topic are represented in the separate sections of the circles, and the items that are common to both topics are represented in the center overlapping sections. Harlow creates this Venn diagram comparing and contrasting endothermic and exothermic processes.

When liquid silver nitrate and liquid sodium chloride are combined, solid silver chloride forms along with a new liquid, sodium nitrate. Which substance represents the precipitate?

What must occur in order for a chemical reaction to be specifically classified as endothermic instead of exothermic?