Thermodynamics Flashcards
what is the formula & definition of change in energy
the sum of all the energy components in the system
for thermodynamics
change in E = q + w
where E is the sum of kinetic & potential energies (only kinetic for gas), q is the heat transferred & w is the work done
what is q for endothermic
+ve
what is q for exothermic
-ve
what is w if the system does work on the surroundings
-ve
what is w if the system gets work done to it
+ve
what is enthalpy
heat transferred at constant pressure (-ve)
what is the formula for change in enthalpy
change in E or E of products - E of reactants
what does it mean if the enthalpy is endothermic
less energy goes to reactants and products have higher potential energy
what is heat capacity
energy required to raise the temp of the object by 1C or 1K
what is specific heat capacity
energy for one gram
what is molar heat capacity
energy for one mole
what is a calorimeter
a device used to measure heat flow
in thermodynamics, what can the change in enthalpy be approximated to
change in energy
what is the melting point of ice
0deg. C
given the equlibrium constants of 2 reactions, how do you determine the constant if the reactions are added together
Kc1*Kc2
