thermal energy ch 11

Question 1

what is the least energy change type to the highest

Answer 1

physical, chemical, nuclear

Question 2

what is enthlapy

Answer 2

the total potential and kinetic energy

potential energy is where energy is found in between molecules or within atoms

kinetic energy is the movment of atoms and the higher temp means the more kinetic energy

Question 3

endothermic traits / ways of representing

Answer 3

• possitive enthlapy
• on the reactants side
• tempature of water goes down
• on graph the step moves up to show positive

Question 4

exothermic traits / ways of representing

Answer 4

• negative enthlapy
• on products side
• temp of water moves up
• on graph step moves down to show negative

Question 5

3 things needed for a calorimiter to be sucessful

Answer 5

1- isolated system !!! matter cannot move in or our
2- carefully designed experiments
3- precise measurements

Question 6

when using the Q=mct formula how do you know what units Q will be

Answer 6

the units of Q are relient of how the mass matches the specific heat capacity

if the mass is kg then the Q will be kJ if the mass is in g then Q will be J and need / 1000 to get KJ

mass must match specific heat capacity !