Question

question 4
which of the following comparisons or contrasts between endergonic and exergonic reactions is false?
endergonic reactions have a positive δg and exergonic reactions have a negative δg.
endergonic reactions consume energy and exergonic reactions release energy.
both endergonic and exergonic reactions require a small amount of energy to overcome an activation barrier.
endergonic reactions take place slowly and exergonic reactions take place quickly.
none of these answer choices are correct.

question 5
which of the following is the best way to judge the activation energies between two given chemical reactions?
compare the δg values between the two reactions.
compare their reaction rates.
compare their ideal environmental conditions.
compare the spontaneity between the two reactions.
none of these answer choices are correct.

question 6
which of the following is not an example of an energy transformation?
turning on a light switch
solar panels at work
formation of static electricity
none of these answer choices are correct.
all of these answer choices are correct.

Explanation:

• Question 4: Endergonic reactions have a positive $\Delta G$ (free - energy change) and consume energy, while exergonic reactions have a negative $\Delta G$ and release energy. Both types of reactions require activation energy. However, the rate of a reaction (slow or fast) is not determined by whether it is endergonic or exergonic.
• Question 5: The reaction rate is related to the activation energy. Generally, a higher activation energy means a slower reaction rate. Comparing reaction rates can give an indication of the relative activation energies of two reactions. $\Delta G$ values relate to spontaneity, not directly to activation energy. Ideal environmental conditions and spontaneity do not directly measure activation energy.
• Question 6: Turning on a light - switch converts electrical energy to light and heat energy. Solar panels convert solar energy to electrical energy. The formation of static electricity involves the transfer and separation of electrical charges, which is also an energy - related process. All are examples of energy transformations.

Answer:

Question 4: Endergonic reactions take place slowly and exergonic reactions take place quickly.
Question 5: Compare their reaction rates.
Question 6: None of these answer choices are correct.