THERMO NOTES SIR DENVER

Question 1

Energy can be transferred but NO MASS can either enter / leave a closed system

Answer 1

CLOSED SYSTEM

Question 2

Both mass and energy are transferred

Answer 2

OPEN SYSTEM

Question 3

A system which neither mass nor energy cross the boundaries and is not influenced by the surroundings

Answer 3

ISOLATED SYSTEM

Question 4

Physical condition of the working substance such as temperature, pressure, density, specific volume, specific gravity / relative density

Answer 4

STATE PROPERTIES

Question 5

A temp. Measured from absolute zero

Answer 5

ABSOLUTE TEMPERATURE

Question 6

The temp w/c the molecules are believed to stop moving

Answer 6

ABSOLUTE ZERO

Question 7

True pressured measured from a perfect vacuum

Answer 7

ABSOLUTE PRESSURE

Question 8

The pressure measured from the level of atmospheric pressure by most pressure recording instrument like pressure gauge and open ended manometer

Answer 8

GAUGE PRESSURE

Question 9

Pressure obtained from barometric reading

Answer 9

ATMOSPHERIC PRESSURE

Question 10

The heat needed to change the temperature of the body without changing its phase.

Answer 10

SENSIBLE HEAT

Question 11

The heat needed by the body to change its phase without changing its temperature

Answer 11

LATENT HEAT

Question 12

The measure of energy that is no longer available to perform useful work within the current environment

Answer 12

ENTROPY

Question 13

The energy stored within the body. Sum of kinetic energies of all its constituent particles plus the sum of all the potential energies of interaction among theses particles

Answer 13

INTERNAL ENERGY (U)

Question 14

The heat energy transferred to a substance at a constant pressure process. Represents the total useful energy of a substance

Answer 14

ENTHALPHY (H)

Question 15

An experimental technique used to measure the specific heat of a substance

Answer 15

CALORIMETRY

Question 16

Defined as one in which all collisions between atoms of molecules are perfectly elastic and there are no intermolecular force attractive forces

Answer 16

IDEAL GAS

Question 17

At equal volume, at the same temperature and pressure conditions, the gases contain the same number of molecules

Answer 17

AVOGADRO’S LAW

Question 18

Is any change that a system undergoes from one equilibrium state to another

Answer 18

PROCESS

Question 19

Refers to the series of states through which a system passes during a process

Answer 19

PATH

Question 20

The process that takes place in a closed system

Answer 20

NONFLOW PROCESS

Question 21

The process that takes place in an open system which the quantity of matter within the system is constant.

Answer 21

STEADY FLOW PROCESS

Question 22

Is one in which both the system and the surroundings are returned to their original states otherwise it is irreversible process

Answer 22

REVERSIBLE PROCESSES

Question 23

A process which gives the same states/ conditions after the system undergoes a series of process

Answer 23

CYCLIC PROCESS

Question 24

Process in whose the system DEPART from the equilibrium state only infinitesimally at every instant

Answer 24

QUASI - STATIC PROCESS

Question 25

Constant volume process

Answer 25

ISOMETRIC

Question 26

Constant temperature process

Answer 26

ISOTHERMAL

Question 27

Constant pressure process

Answer 27

ISOBARIC

Question 28

One in which no heat or other energy is transferred to or from the system

Answer 28

ADIABATIC PROCESS

Question 29

An ADIABATIC process in which there is no change in the system ENTROPY

Answer 29

ISENTROPIC

Question 30

An ADIABATIC process which there is no change in the system ENTHALPHY but for which there is significant pressure drop

Answer 30

THROTTING PROCESS

Question 31

The most efficient thermodynamic cycle that is consist of two isothermal and two ISENTROPIC/ ADIABATIC processes

Answer 31

CARNOT CYCLE

Question 32

Process transferring heat from a low temperature area to a high temperature area

Answer 32

REFREGIRATION