What is the primary purpose of calculating the enthalpy of reaction?
General Chemistry | Enthalpy of Reaction (ΔH_rxn) [Example 1]

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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To calculate the pressure change in a reaction
To find the overall energy change in a reaction
To determine the speed of a reaction
To measure the temperature change in a reaction
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the enthalpy of formation for oxygen gas considered zero?
Because it is a liquid at room temperature
Because it is not involved in the reaction
Because it is in its standard state
Because it is a noble gas
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is necessary to calculate the enthalpy of reaction?
The color of the reactants
The volume of the reaction container
The enthalpies of formation of reactants and products
The speed of the reaction
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the calculation of enthalpy of reaction, why is it important to use the correct phase of a substance?
Because the phase affects the speed of the reaction
Because the phase affects the enthalpy of formation
Because the phase affects the pressure of the reaction
Because the phase affects the color of the substance
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the enthalpy of formation for glucose as a solid?
-285.8 kJ/mol
-393.5 kJ/mol
-1,260 kJ/mol
0 kJ/mol
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the final calculated enthalpy of reaction for the combustion of glucose?
-2,815.8 kJ/mol
-1,260 kJ/mol
-4,075.8 kJ/mol
-1,714.8 kJ/mol
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to remember the signs when calculating enthalpy of reaction?
Because they affect the final enthalpy value
Because they determine the color of the reaction
Because they change the phase of the reactants
Because they alter the speed of the reaction
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