Flashcards in OpenStax Chapter 5 Deck (35):
What is thermochemistry?
the amount of heat absorbed or produced during a reaction
capacity to supply heat or do work
process of causing matter to move against an opposing force
the energy an object has because of its position
the energy that an object possesses because of its motion
Can energy be converted from one form to another?
what is the first law of thermodynamics?
energy cannot be created or destroyed
kinetic energy associated with the random motion of atoms and molecules
measure of hot or cold
what letter in equations is used for heat? (How is heat represented?)
change that releases heat
reaction that absorbs heat
how is energy measured? (HINT - begins with c(
what is something else other than calorie used to measure energy?
How do you find heat capacity (C)? ( What is the equation?
C = q/(delta)T
what is the specific heat capacity equation?
c = q/m(delta)T
what is the specific heat of water?
What is the equation for finding heat when specific heat and mass is known?
q = (specific heat (c))x(Mass (m))x(temperature change (deltaT)
what is calorimetry used for?
measuring heat transferred from one substance to another
what is a system?
the part undergoing the change
everything outside of the reaction
used to measure the amount of heat involved in a reaction
are the reactants/products or the reaction/solution an inverse relationship?
used when yield is high
nutritional calorie (C) is equal to?
1000 calories or 1 kcal
relationships between heat work and other energy
substances act as reservoirs of what?
total of all possible types of energy is called the
internal energy (U)
the relationship between internal energy heat and work is represented by the equation
(delta)U = q(heat)+w(work)
when a system pushes back against the surroundings
descriptor of the thermodynamics of a reaction
the equation for enthalpy change is
(delta)H = (change)U(energy)+PV
heat of combustion
the change in H when 1 mol is burned
compound made only of hydrogen and carbon