energy in reactions\n4. what is released or absorbed whenever chemical bonds form or are broken?\n5. what is…

energy in reactions\n4. what is released or absorbed whenever chemical bonds form or are broken?\n5. what is the energy of activation?\n6. of the two reactions shown, which one is more likely to start spontaneously and why?\nenzymes\n7. how does the addition of a catalyst affect the energy of activation of a chemical reaction?\n8. what type of catalysts affect biochemical reactions?\n9. what makes proteins the ideal types of compounds to act as enzymes?

energy in reactions\n4. what is released or absorbed whenever chemical bonds form or are broken?\n5. what is the energy of activation?\n6. of the two reactions shown, which one is more likely to start spontaneously and why?\nenzymes\n7. how does the addition of a catalyst affect the energy of activation of a chemical reaction?\n8. what type of catalysts affect biochemical reactions?\n9. what makes proteins the ideal types of compounds to act as enzymes?

Answer

Explanation:

Step1: Identify reaction types

In an endothermic reaction, energy is absorbed and the products have higher energy than the reactants. In an exothermic reaction, energy is released and the products have lower energy than the reactants. The first graph shows an endothermic reaction (products have higher energy) and the second shows an exothermic reaction (products have lower energy).

Step2: Define energy in bond - formation/breakage

When chemical bonds form or are broken, energy is involved. Forming bonds releases energy and breaking bonds absorbs energy.

Step3: Define activation energy

The energy of activation is the minimum amount of energy that reactant molecules must have in order to undergo a chemical reaction.

Step4: Determine spontaneous reaction

The exothermic reaction (second graph) is more likely to start spontaneously because it releases energy and has a lower activation - energy barrier in many cases compared to endothermic reactions.

Step5: Effect of catalyst on activation energy

A catalyst lowers the energy of activation of a chemical reaction by providing an alternative reaction pathway with a lower energy barrier.

Step6: Identify biochemical catalysts

Enzymes are the type of catalysts that affect biochemical reactions.

Step7: Explain why proteins are good enzymes

Proteins are ideal as enzymes because they have complex three - dimensional structures. These structures allow them to have specific active sites that can bind to substrates and catalyze reactions.

Answer:

  1. Energy
  2. The minimum amount of energy that reactant molecules must have to undergo a chemical reaction.
  3. The second (exothermic) reaction, because it releases energy and often has a lower activation - energy barrier.
  4. It lowers the energy of activation.
  5. Enzymes
  6. They have three - dimensional structures.