L2: Law Of Thermodynamics, Work

Question 1

in _____, Rudolf Clausius and William Thomson (Kelvin) stated both the First Law and the Second Law of Thermodynamics

Answer 1

1850

Question 2

in 1850, __________ stated both the First Law and the Second Law of Thermodynamics

Answer 2

Rudolf Clausius and William Thomson (Kelvin)

Question 3

1st /2nd law of thermodynamics is aka

Answer 3

Law of conservation of energy

Question 4

it refers to the overall energy of the system and may include many forms of energy such as potential and kinetic energy

Answer 4

Internal energy

Question 5

It may change when heat passes into or out of the system and when work is done on or by the system.

Answer 5

Internal energy

Question 6

is the quantity of energy exchanged between a system and its surroundings

Answer 6

Work (W)

Question 7

is the kinetic energy of the molecules of the substance.

Answer 7

Heat (Q)

Question 8

______ flows from higher temperature to lower temperature

Answer 8

Heat energy

Question 9

the unit of energy in Sl unit, named after James Prescott Joule.

Answer 9

Joule (J)

Question 10

the unit of energy in Sl unit, named after _______.

Answer 10

James Prescott Joule

Question 11

1 kilo Joule (kJ) =

Answer 11

1000 J

Question 12

1 calorie (cal) =

Answer 12

4.184 J

Question 13

Difference : 🔼U and U

Answer 13

Change in Internal energy,
Internal energy

Question 14

The increase in the internal energy of a system is equal to the amount of heat added to the system, plus the amount of work done on the system.
Formula

Answer 14

🔼U = Q + W

Question 15

The increase in the internal energy of a system is equal to the amount of heat added to the system, minus the amount of work done by the system

Answer 15

🔼U = Q - W

Question 16

Other formula

Answer 16

🔼U = U^f - U^I

W = P🔼V

Question 17

If
Heat - absorbed/added to systeem
Work - on system

Answer 17

Int.energy increases

Question 18

If heat evolved/ leaves system
Work - by

Answer 18

Decreases in.eg

Question 19

If Q (+) and W (-) or if Q (-) and W (+), the sign of (AU) depends on the ______

Answer 19

magnitude of Q and W