Chapter 6 Test Flashcards
The unit Calorie used in food is equivalent to which of the following chemical units?
kilocalorie
In the equation E = q + w, what does the w represent
work
Which of the following correctly represents an exothermic reaction?
ΔH < 0
If the products of a reaction are higher in enthalpy than the reactants, the reaction is:
endothermic
What is the primary difference between coffee-cup calorimetry and bomb calorimetry?
Coffee-cup calorimetry is carried out at constant pressure and bomb calorimetry is carried out at constant volume.
What does a coffee cup calorimeter measure?
Heat at constant pressure
What are the two ways that energy can be transferred between the system and the surroundings?
work and heat
In the field of thermodynamics, what are the surroundings?
everything other than the system
Which of the following describes an exothermic reaction
a reaction that moves heat from the system into the surroundings
What formula is used to calculate work?
word = F * d
Which of the following is not a form of energy?
voltage
What is the most common unit used in measuring heat?
calorie
When a gas expands against a constant external pressure, what is true of work, w?
It is negative.
The heat required to raise one gram of a substance by one degree Celsius is the definition of ______.
the specific heat
What is the correct definition of heat?
Heat is the energy that flows because of difference in temperature between the system and its surroundings.
