Chemical Engineering
What is a fluid?
A substance that can flow and has no fixed shape
Name 2 of the functions of food packaging a materials engineer needs to keep in mind.
Keeping food clean
Protect food from chemical or physical damage
Ensure the packaging is still appealing and informative of the products information
Be inexpensive
What does chemical change mean in a reaction?
That the chemical composition of the initial substances has been altered.
What is an example of a chemical reaction that causes a physical change?
The iodine clock experiment!
What is chemical engineering?
Type of engineering that uses chemical reactions to create safe, sustainable, and economically viable products.
What does reactivity mean?
How easy a substance can interact with another substance and how fast
What is an example of additive manufacturing?
3D printing!
What does state change mean in a reaction?
when a substance changes from being a solid, liquid, or a gas into another one of these 3 states
What is an example of a reaction that causes a state change?
Freezing water, causing it to turn into ice!
The juicy spheres project
What is materials engineering?
Type of engineering that uses science to improve the performance of materials. They look at the relationships between structure, properties, processing, and performance of a material.
What is a base?
A base has space to accept protons in a solution
They have a Ph above 7
What ingredients did you use to make the shell for your juicy spheres?
Water
Calcium chloride
Juice
Sodium alginate
What are chemical properties vs physical properties?
Physical properties is a characteristic of a substance that can be observed, or measured without changing the identity of the substance. Ex: colour, density, the melting or boiling point.
Chemical properties is the ability of a substance to undergo chemical changes into a brand new substance. Ex: flammability, toxicity, acidity, reactivity, heat combustion.
What is an example of a chemical reaction that causes a chemical change?
Combustion of wood. It reacts with oxygen to form carbon dioxide and water vapours.
What was your favourite project and why?
Many possible answers. Up to instructors to decide.
What is an acid?
Acids have protons attached to them, and can give up a proton while in a solution
They have a pH lower then 7.
What is an example of how materials engineers help with sustainability?
Sustainable packaging!
Other answers can be correct, up to instructor to decide.
Name 1 of the factors that can affect a chemical reaction?
Temperature
Concentration
Pressure
etc
What is an example of a reaction that causes an exothermic reaction?
Soap making! the reactions during soap making release heat as a byproduct
What did you learn about chemical and materials engineering?
Many possible answers. Up to instructors to decide.
What are some examples of inventions a chemical engineer may make?
Answer is up to instructor
Fertilizers
Refined oils and fuel
Cleaning products
etc
What are some examples of inventions a materials engineer may make?
Many answers possible, up to instructor to decide.
Soap
Edible solid casings, like in the juicy spheres. They can also be used to help administer medication.
Stretchable materials for clothing
biodegradable products
etc
What is an exothermic reaction?
A chemical reaction that releases energy via light or heat.
What are the 2 reactions that happened in the iodine clock experiment?
The vitamine C reacted with the iodine
Then, the iodine reacted with the starch, which is what caused the colour to change!
What are the names of your 3 instructors and JI?
Instructors reveal answer