Thermochemistry
Reaction where system absorbs energy
What is an endothermic reaction?
Some fabrics and rubber in shoes
What is a synthetic polymer?
The bouncy ball activity used this type of starch
What is cornstarch?
This is an example of an ingredient in the bouncy ball activity
What is cornstarch, glue, or borax?
Melting and vaporization are examples of this
What is an endothermic phase change?
compounds formed from long chains of smaller molecules called monomers
What is a polymer?
The activity with the metal and the water is an example of this
A campfire is an example of this type of reaction
What is exothermic?
A reaction where heat "exits" the reaction/substance the energy change is negative.
What is Exothermic Rxn?
T/F: a polymer may have one type or many types of monomers.
What is true?
The activity with the metal and water used this equation
What is ΔH surroundings = - ΔH system?
Ice melting is an example of this type of reaction
What is endothermic?
another name for heat (@ constant P)
What is enthalpy?
What polymers are held together by
What are covalent bonds?
When you mix sodium borate (borax) with water, the _______ ion forms.
What is borate?
This phase change involves liquids turning into solids
What is freezing?
The sign for water (surroundings) getting warm as calcium chloride (system) dissolves
What is -ΔH?
Amino acids -> build proteins
What is a natural polymer?
When this borate ion solution is mixed with liquid glue, a chemical reaction, ________, occurs, and the long polymer molecules group and shorten.
This phase change involves gas turning to liquid
What is condensation?