Question 1 A)Which result occurs during an exothermic reaction?(1 point) Responses Light is released into the environment, while heat is absorbed. Light is released into the environment, while heat is absorbed. Light or heat are released into the environment. Light or heat are released into the environment. Light and heat are absorbed from the environment. Light and heat are absorbed from the environment. Heat is released into the environment, while light is absorbed. Heat is released into the environment, while light is absorbed. Question 2 A)Which event is an example of an endothermic reaction?(1 point) Responses photosynthesis photosynthesis condensation condensation rusting of iron rusting of iron burning wood burning wood Question 3 A)How is total reaction energy calculated?(1 point) Responses product bond energy × reactant bond energy product bond energy × reactant bond energy reactant bond energy – product bond energy reactant bond energy – product bond energy product bond energy ÷ reactant bond energy product bond energy ÷ reactant bond energy reactant bond energy + product bond energy reactant bond energy + product bond energy Question 4 A) When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. The equation is shown. H2 + I2 → 2HI What is the total energy of the reaction? Is this an endothermic or exothermic reaction? (1 point) Responses 9 kJ/mol, exothermic 9 kJ/mol, exothermic –9 kJ/mol, exothermic –9 kJ/mol, exothermic –9 kJ/mol, endothermic –9 kJ/mol, endothermic 9 kJ/mol, endothermic 9 kJ/mol, endothermic Question 5 A) Hydrogen bromide breaks down into diatomic hydrogen and bromine in the reaction shown. 2HBr → H2 + Br2 The energy of the reactant is 732 kJ/mol, and the energy of the products is 630 kJ/mol. What is the total energy of the reaction? Is this reaction endothermic or exothermic? (1 point) Responses 102 kJ/mol, exothermic 102 kJ/mol, exothermic –102 kJ/mol, endothermic –102 kJ/mol, endothermic 102 kJ/mol, endothermic 102 kJ/mol, endothermic –102 kJ/mol, exothermic –102 kJ/mol, exothermic

Answer 1

Here are the answers to your questions based on the principles of thermodynamics:

Question 1: A) Which result occurs during an exothermic reaction?

• Response: Light or heat are released into the environment.

Question 2: A) Which event is an example of an endothermic reaction?

• Response: photosynthesis

Question 3: A) How is total reaction energy calculated?

• Response: reactant bond energy – product bond energy

Question 4: A) When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. What is the total energy of the reaction? Is this an endothermic or exothermic reaction?

• Response: 9 kJ/mol, endothermic (since energy of products is greater than that of the reactants)

Question 5: A) Hydrogen bromide breaks down into diatomic hydrogen and bromine. The energy of the reactant is 732 kJ/mol, and the energy of the products is 630 kJ/mol. What is the total energy of the reaction? Is this reaction endothermic or exothermic?

• Response: -102 kJ/mol, exothermic (since energy of products is less than that of the reactants)

Let me know if you need further clarification on any of these topics!