1st Law

Question 1

• study of relationships involving heat, mechanical work and other aspects of energy and energy transfer
• deals w/ heat and temp. and the interconversion of heat and other forms of energy.

Answer 1

THERMODYNAMICS

Question 2

involve changes in the state of thermodynamic systems

Answer 2

Thermodynamic Processes

Question 3

part of the universe in which observations are made, and the remaining universe constitutes the surroundings

Answer 3

Thermodynamic system

Question 4

REMEMBER:
Universe = system + surroundings

Answer 4

…

Question 5

is embedded in its environment surroundings, thru which it can exchange heat and do work on

Answer 5

Thermodynamic system

Question 5

We describe the energy relations in any thermodynamic process in terms of the ___________, added to the system and the ___________, done by the system.

Answer 5

quantity of heat, Q
work, W

Question 5

extension of the principle of conservation of energy

Answer 5

first law of law of thermoynamics

Question 6

3 classifications of thermodynmamics

Answer 6

open system (matter and energy can leave or enter)
closed system (only energy can leave/enter)
isolated system (energy nor matter cannot leave/enter )

Question 7

TRUE/FALSE
In any system in which the volume is constant, the system does work on the surroundings.

Answer 7

FALSE ( does no work)

Question 8

series of intermediate states where a thermodynamic system passes thru as it changes from initial to final state

Answer 8

path

Question 9

TRUE/FALSE

heat and work done by the system depends not only on the initial state and final state but also on the intermediate states, that is, on the path.

Answer 9

TRUE

Question 10

sum of the total KE of all its constituent particles and all the total potential energy of interaction among these particles

Answer 10

Internal energy ( U )

Question 11

When a quantity of heat Q is added to a system which does no work, its internal energy _______ by an amount equal to _________

Answer 11

increases
Q

Question 12

When the system does work, W, and no heat is added during the process, energy leaves the system and the internal energy _______

Answer 12

decreases

Question 13

TRUE/FALSE

Change in internal energy is independent of path

Answer 13

TRUE

Question 14

process that eventually returns a system to its initial state

Answer 14

cyclic process

Question 15

In an ________system, there is no work done on its surroundings and no heat flow to or from its surroundings.

Answer 15

isolated

Question 16

TRUE/FALSE

Internal energy of an isolated system is constant

Answer 16

TRUE

Question 17

“energy cannot be created or destroyed, only converted from one form to another”

Answer 17

Conservation of energy
First law of thermodynamics

Question 18

this law of thermodynamics states that the energy of the universe remains the same

Answer 18

First law of thermodynamics

Question 19

Kinds of thermodynamics processes

Answer 19

1. adiabatic process
2. isochoric “
3. isobaric “
4. isothermal “

Question 20

process with no heat transfer into and out of the system

Answer 20

ADIABATIC PROCESS

Question 21

• a constant-volume process
• in this process, all the energy added to the system as heat is used to increase its internal energy.

Answer 21

ISOCHORIC PROCESS

Question 22

a constant-pressure process

Answer 22

ISOBARIC PROCESS

Question 23

a constant-temperature process

Answer 23

ISOTHERMAL PROCESS

Question 24

path followed in an adiabatic process

Answer 24

ADIABAT

Question 25

path followed in an ISOCHORIC process

Answer 25

ISOCHOR

Question 26

path followed in an isobaric process

Answer 26

ISOBAR

Question 27

path followed in an isothermal process

Answer 27

isotherm