Thermochem Review
Authored by Carol Vaughn
others
9th - 12th Grade
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student is trying to develop a model of an instant cold pack. What is the essential characteristic of the chemical reaction that the student should use to develop the cold pack?
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which two statements about the standard enthalpy of formation of a compound are true?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the standard enthalpy for the reaction based on the information shown. Round to the nearest whole number.
-135 kJ/mol
-1135 kJ/mol
-825 kJ/mol
-73 kJ/mol
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The thermochemical equation for the formation of PCl₃ from its constituent elements is shown. How much energy is released when 82.1 g of PCl₃ form?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The assumption that the heat gained is equal to the heat lost in a calorimetry experiment is based on what concept?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An element in its standard state has a heat of formation of 0 kJ/mol. What two conditions define standard state?
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Your fingers quickly begin to feel cold when you touch an ice cube. What important thermochemical principle does this change illustrate? Choose the best answer.
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