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Enthalpy of Reaction Quiz

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Questions and Answers

What is the experimental method of determining the energy released from a reaction?

Heats of Reaction & Molar Enthalpies

Hess’s Law

Standard Enthalpies of Formation

Calorimetry (correct)

In a closed system containing pure water, how are transfers of thermal energy measured?

By the pressure inside the system

By the color change of the water

By an increase or decrease in temperature of the water (correct)

By the volume of water used

What symbol is used to denote heat in the context of energy released from a reaction?

(q) (correct)

(E)

(T)

(H)

Why must the energy released from a reaction be absorbed by the water in a calorimetry experiment?

Energy is a constant, so the released energy must be absorbed by the water Signup and view all the answers

What does a positive or negative value of heat (q) from a system indicate?

Whether energy is released or absorbed by the system Signup and view all the answers

In a calorimetry experiment, why is a reaction carried out in a closed system containing pure water?

To measure any transfers of thermal energy by an increase or decrease in temperature of the water Signup and view all the answers

What is the symbol used to denote the heat in the context of energy released from a reaction?

(q) Signup and view all the answers

Which method is a mathematical approach to determine the enthalpy of a reaction?

Hess’s Law Signup and view all the answers

What does a positive value of heat (q) from a system indicate?

Energy released from the system Signup and view all the answers

Which experimental method is used to determine the energy released from a reaction in a closed system containing pure water?

Calorimetry Signup and view all the answers