Some Reactions, Such as the Decomposition of Nitroglycerin in Dynamite

question 8

Multiple Choice

Some reactions, such as the decomposition of nitroglycerin in dynamite, release large amounts of energy in the form of heat.Others, such as those taking place inside cells, release much smaller amounts of heat.Which statement is true about these reactions?

• A) The total amount of energy involved in the cellular reactions is conserved, but new energy is created during the explosive reaction involving nitroglycerin.
• B) Though a larger overall change in energy occurs in the nitroglycerin reaction, the total amount of energy present before and after each reaction does not change.
• C) Cells use up energy, causing an overall decrease in the total amount of energy present before cellular reactions, while nonliving things, such as dynamite, do not.
• D) Both living cells and nonliving things, such as dynamite, cause an overall loss of energy when they release heat during reactions.
• E) Only living things conserve energy from their reactions in the form of chemical bond energy, while nonliving things, such as dynamite, lose energy when they react.

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