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Gc2 q3 week 7

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GC2Q3-Week 7
Learning Task 2:
Directions: Read the following situation. Answer the following guide questions in your own opinion.
Today is the hottest day ever recorded in the Philippines with a whopping 36˚C. You are at your
room then you decided to turn on the air-conditioner. The usual setting of your air-conditioner is only at
“low cool”. However, after almost an hour, your room stills seems to be warmer. You increase the
setting to “high cool” which you never do until now.
1. Why do you think that your room still seems warmer than usual? Your room is perfectly enclosed.
~ Low cool mode is best for humid temperatures like 25°C-30°C, which may be why the room is still
warmer than usual even though it is perfectly enclosed, while high cool mode is best used for
temperatures ranging from 31°C-40°C. Low cool cannot withstand such a high temperature, whereas
high cool can.
2. Is this process endothermic or exothermic? Explain.
~ Endothermic reactions are chemical reactions in which the reactants absorb heat from the
surroundings to produce products. These reactions cause a cooling effect by lowering the temperature
of the surrounding area. When the temperature of an isolated system drops while the surroundings of a
non-isolated system heats up, this is known as an endothermic reaction. Because air conditioners
remove heat and humidity from the air within your home, then transfer that heat and humidity outside
while returning the newly cooled air to the house, the process is endothermic. Air conditioners do not
bring air from outside into your home. Instead, they function by lowering the temperature of the air
currently present in your home.
3. How do external uncontrolled factors affect chemical reactions? Is it safe?
~ Chemical reactions are influenced by variables such as reactant concentration, temperature, and the
presence of a catalyst. The rate of reaction is frequently increased by increasing the concentration of
one or more reactants. This happens because a larger concentration of a reactant causes more reactant
collisions in a given time period. The average kinetic energy of the reactant molecules will grow as the
temperature rises. As a result, a higher fraction of molecules will possess the minimum energy required
for a successful collision. Finally, a catalyst is a material that participates in a reaction without being
consumed, therefore speeding it up. Catalysts offer a different technique to get products from a
reaction. These external uncontrolled factors affecting chemical reactions can be or can not be safe.
Sometime they are explosive, sometimes they are not.
4. What can you do to control these factors and isolate the reaction?
~ The reaction rate can be isolated from the concentration of the chosen reactant by having all other
reactants present in huge excesses, ensuring that their concentration remains practically constant
throughout the reaction. Many factors influence the rate of a chemical reaction, including reactant
concentration, surface area, temperature, and catalysts. We can increase or decrease the concentration

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of a reactant in solution, the surface area of a solid reactant, and the temperature of the reaction
system. All of these can increase or decrease the rate of a reaction, thus controlling it. A catalyst can
also be added to a chemical mixture to speed it up.
Learning Task 4:
As stated by the First Law of Thermodynamics, energy can only be converted from one form to
another; it cannot be destroyed nor created. Look around you, do you see something that can be
converted into energy? or something that may be used as an alternative source instead of fossil fuels?
Task:
1. Create a poster spreading awareness about the existence of alternative clean energy. It may be
converting water flow from a stream into electricity or even using decomposing materials as a source.
You may add a short description on how this type of alternative source will be beneficial to us.
3. It may be an existing technology with your own input of innovation or even something that doesn’t
exist yet, wow!

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GC2—Q3-Week 7 Learning Task 2: Directions: Read the following situation. Answer the following guide questions in your own opinion. Today is the hottest day ever recorded in the Philippines with a whopping 36˚C. You are at your room then you decided to turn on the air-conditioner. The usual setting of your air-conditioner is only at “low cool”. However, after almost an hour, your room stills seems to be warmer. You increase the setting to “high cool” which you never do until now. 1. Why do you think that your room still seems warmer than usual? Your room is perfectly enclosed. ~ Low cool mode is best for humid temperatures like 25°C-30°C, which may be why the room is still warmer than usual even though it is perfectly enclosed, while high cool mode is best used for temperatures ranging from 31°C-40°C. Low cool cannot withstand such a high temperature, whereas high cool can. ...
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