Thermodynamics (2)

Question 1

What does the first order of law of Thermodynamic state ?

Answer 1

It states that energy is conserved during phisicochemical change.
e.g. chemical energy of a battery converted into electrical energy

Question 2

what factor decrease capacity to do work always ?

Answer 2

temperature

Question 3

What is a spontaneous change ?

Answer 3

A chnage that chnages naturallt

Question 4

How does spontanous change affect capacity of work ?

Answer 4

• It reduces cpacity of work, which in configured into useful work

Question 5

What is heat ?

Answer 5

• vigorous and random vibration,rotation and movement of molecules (centre of mass doesn’t move)
• heat is chaotic form of energy

Question 6

What is the molecular level of solids, liquids and gasses ?

Answer 6

• solids are more ordered than liquids
• liquids are more ordered than gases

Question 7

What are sponatanous exothermic reactions ?

Answer 7

• spontanous exothermic reaction warm the surrounding and heat is a disordered form of energy

Question 8

What are spontaneous endothermic reactions ?

Answer 8

Spontaneous endothermic reactions change the system into a more distorted forms of matter

Question 9

what is the trend between entropies(S) and molecular disorder ?

Answer 9

the higher the S the hier the molecular disorder

Question 10

what is work ?

Answer 10

an ordered form of energy

Question 11

What does the first law tell us ?

Answer 11

Tells us whether a process is possible

Question 12

What does the second law of thermodynamics tell us ?

Answer 12

It states that no process is permissible where heat is completley convert into work

Question 13

chemical systems with a high capacityn to do work have a……..

Answer 13

high chemical potential

Question 14

how much capacity to work is there when there is 0 chemical reaction ?

Answer 14

no capacity to work

Question 15

reactions that are spontaneous are always………

Answer 15

reduce the chemical potential of the system