Thermochemistry Flashcards
Isothermal Process
No chance in temperature, thus no change in internal energy
Delta U= 0, Q=W (head added to the system=work done BY the system)
Adiabatic
No heat exchange; Q=0, delta U= -W (change in internal energy = work done ON the system)
Isobaric
No change in pressure; line is flat
isocolumetric (Isochoric)
No change in volume, W= 0; delta U= Q
Standard Conditions
25 degrees celcius, 1atm pressure, and 1M concentration.
What do you call the transition from solid to gas?
Sublimation
What is the transition from solid to liquid called?
Fusion or Melting
Process function
define the path between equillibrium states, include health (Q) and Work (W)
State Functions
Independent of the path taken to achieve equilibrium
Density, Pressure, Temperature, Volume, Enthalpy, Internal Energy, Gibbs free energy, Entropy
Triple point
Combination of temperature and pressure where all three phases are in equillibrium
Critical point
Temperature and pressure above which the liquid and gas phases are indistinguishable and heat of vaporization is zero
Temperature
Indirect measure of the thermal content of a system that looks at the average kinetic energy of particles in a sample.
Heat
is the thermal energy transferred by one degree as a result of differences in their temperatures.
specific heat
It is the heat required to raise the temperature of one gram of a substance by one degree celsius
Heat Capacity
mc product of mass and specific heat and is the energy required to raise any given amount of a substance one degree celsius
