🔥 Fire & Brimston🔥
What happens when methane bubbles are ignited?
They burst into fireballs
What happens when you mix vinegar and baking soda in the lecture?
Carbon dioxide gas is produced
Why is it important to wear goggles during chemical experiments?
To protect eyes from chemical splashes and heat
True or False: The 'instant ice' experiment shows that ice can freeze instantly when you add a seed crystal.
Answer: True
What would likely happen if the hydrogen balloon experiment was done in a small room?
The explosion could cause a fire or injury
True or False: Hydrogen balloons are safe to pop without any safety precautions.
Answer: False
Define viscosity in simple terms.
The ability of a liquid to flow
It's safe to inhale the fumes produced during combustion reactions in an enclosed space.
False
What happened during the burning of the diamond experiment?
The diamond burned and turned into carbon dioxide
hy do non-Newtonian fluids change their behavior when force is applied?
Because their molecular structure changes under pressure
Which of the following materials is used to initiate a thermite reaction?
A) Magnesium ribbon
B) Baking soda
C) Copper wire
D) Sodium hydroxide
Answer: A) Magnesium ribbon
Which of the following is an example of a non-Newtonian fluid shown in the lecture?
A) Water
B) Oobleck
C) Oil
D) Alcohol
Oobleck (cornstarch and water)
What is the main reason to wear a lab coat during chemistry experiments?
To protect your skin from chemical spills and splashes
How could the 'instant ice' experiment be useful in real life?
It could aid in developing new cooling systems.
(Movie effects)
How does understanding polymer behavior help in everyday life?
It helps in the development of better packaging materials
(Real Spiderman Webs)
What does the term 'exothermic reaction' mean?
A reaction that releases heat
True or False: Polymers are large molecules made from repeating smaller units.
True
Why should reactions like the thermite reaction be conducted with shields and barriers?
To contain heat and molten materials
What was used to demonstrate rapid freezing or 'instant ice' in the lecture?
Supercooled water
True or False: When chemicals react, they always release light and heat.
Answer: False (not all reactions are exothermic; some absorb energy)
What is the primary reason hydrogen gas explodes so violently when ignited?
It combusts rapidly with oxygen
Which property of polymers did Peter Wothers demonstrate in the lecture?
Elasticity and stretching
Why should long hair be tied back during chemistry experiments?
To prevent hair from catching fire or dipping into chemicals
What causes the fog or "smoke" seen when liquid nitrogen is poured into the air?
It boils and condenses moisture in the air
If you needed to design a safer firework using chemistry, what could you change based on the demonstrations?
Control the oxidation rate with safer metal powders and limit ignition sources