BIOCHEM 4300 EXAM 1 QUESTIONS WITH CORRECT
DETAILED ANSWERS 100% VERIFIED
open system - ANSWER exchanges energy and matter with surroundings
cosed system - ANSWER exchanges energy but not matter with surroundings
isolated system - ANSWER does not exchange ernegy or matter with surroundings
ideal gas - ANSWER atoms and molecules occupy no volume and do not interact
what does the energy (delta U) of an ideal gas depend on - ANSWER ONLY on
TEMPERATURE
when is the ideal gas law obeyed - ANSWER low temperatures
when are more terms added to the ideal gas law - ANSWER at higher pressures
standard pressure - ANSWER 1 var
standard ambient temperature and pressure - ANSWER 25 C, 1 bar
standard temperature and pressure - ANSWER 0 C, 1 bar
energy - ANSWER capacity to do work
, modes of energy transfer - ANSWER heat and work
types of energy - ANSWER kinetic and potential
kinetic energy - ANSWER due to an object's motion
potential energy - ANSWER due to an object's position
heat - ANSWER thermal energy transferred from one body of matter to another
endothermic q sign - ANSWER q>0 because system abosrbs energy
exothermic q sign - ANSWER q<0 because system releases energy
diathermic wall - ANSWER ALLOWS heat transfer
adibatic wall - ANSWER NO heat transfer
w>0 - ANSWER surroundings do work on system, compression
w<0 - ANSWER system does work on surroundings, expansion
sign of w during combustion of urea (increase gas molecules) - ANSWER w<0 since
increasing n (moles), so V increases (expansion)
heat produces ___ motion of atoms in surroundings - ANSWER random
DETAILED ANSWERS 100% VERIFIED
open system - ANSWER exchanges energy and matter with surroundings
cosed system - ANSWER exchanges energy but not matter with surroundings
isolated system - ANSWER does not exchange ernegy or matter with surroundings
ideal gas - ANSWER atoms and molecules occupy no volume and do not interact
what does the energy (delta U) of an ideal gas depend on - ANSWER ONLY on
TEMPERATURE
when is the ideal gas law obeyed - ANSWER low temperatures
when are more terms added to the ideal gas law - ANSWER at higher pressures
standard pressure - ANSWER 1 var
standard ambient temperature and pressure - ANSWER 25 C, 1 bar
standard temperature and pressure - ANSWER 0 C, 1 bar
energy - ANSWER capacity to do work
, modes of energy transfer - ANSWER heat and work
types of energy - ANSWER kinetic and potential
kinetic energy - ANSWER due to an object's motion
potential energy - ANSWER due to an object's position
heat - ANSWER thermal energy transferred from one body of matter to another
endothermic q sign - ANSWER q>0 because system abosrbs energy
exothermic q sign - ANSWER q<0 because system releases energy
diathermic wall - ANSWER ALLOWS heat transfer
adibatic wall - ANSWER NO heat transfer
w>0 - ANSWER surroundings do work on system, compression
w<0 - ANSWER system does work on surroundings, expansion
sign of w during combustion of urea (increase gas molecules) - ANSWER w<0 since
increasing n (moles), so V increases (expansion)
heat produces ___ motion of atoms in surroundings - ANSWER random
