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Math

8th Grade Chemical Thermodynamics Quizzes, Questions & Answers

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Chemistry Se 11 B

The 'Chemistry SE 11 B' quiz assesses understanding of thermodynamic principles in chemical reactions, focusing on energy changes in endothermic and exothermic processes, and state changes in matter. It is designed to enhance...

Questions: 6 | Attempts: 209 | Last updated: Mar 20, 2023

Sample Question 1
During an endothermic reaction, heat content in the surroundings decreases because —

The reaction absorbs heat energy

All reactions need heat energy

Energy is given off by the reaction

Heat energy is destroyed during reactions

Sample Question 2
Which of the following equations correctly shows that the combustion of methane is an exothermic reaction?

CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

Heat + CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

CH4(g)+2O2(g)+heat→CO2(g)+2H2O(g)

CH4(g)+2O2(g)→CO2(g)+2H2O(g)+heat

Sample Question 3
Photosynthesis, the reaction plants use to make sugar, is an endothermic reaction. Which best describes the energy of the products and reactants in the photosynthesis reaction?

Energy is absorbed during the reaction, making the energy of the products greater than the energy of the reactants.

Energy is given off during the reaction, making the energy of the products greater than the energy of the reactants.

Energy is absorbed during the reaction, making the energy of the reactants greater than the energy of the products.

Energy is given off during the reaction, making the energy of the reactants greater than the energy of the products.