Thermodynamics 1

Question 1

System

Answer 1

A collection of matter enclosed within a prescribed boundary

Question 2

Boundary

Answer 2

A surface which separates the system from its surroundings

Question 3

Surroundings

Answer 3

Matter external to the system

Question 4

Open system

Answer 4

A system that freely exchanges energy and matter with its surroundings

Question 5

Closed system

Answer 5

A system where only work and heat can cross the boundary

Question 6

Isolated system

Answer 6

A system that does not exchange any matter or energy with its surroundings

Question 7

Working fluid

Answer 7

Matter within the system boundaries and it’s affected by any energy crossing the boundary

Question 8

Matter phase

Answer 8

Quantity of matter with the same chemical composition that is homogenous throughout

Question 9

State

Answer 9

Condition of a system at any instant of time

Question 10

Property

Answer 10

Define the state of the system

Question 11

Intensive property

Answer 11

Property that depends on the mass of the system

Question 12

Extensive property

Answer 12

Property that does depend on the mass of the system

Question 13

Specific property

Answer 13

Extensive property / Mass

Question 14

Thermal equilibrium

Answer 14

No transfer of heat energy between two systems when they are brought into thermal contact

Question 15

Zeroth Law of Thermodynamics

Answer 15

If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other

Question 16

Absolute pressure

Answer 16

Effect of a normal force acting on an area

Question 17

Gauge pressure

Answer 17

Magnitude of the difference between absolute pressure in a system and the absolute pressure of the atmosphere outside a measuring device

Question 18

Process

Answer 18

The path through which a system passes from one state to the other

Question 19

Thermodynamic Equilibrium

Answer 19

State at which no change occurs within the system when it is isolated from the surroundings

Question 20

Work

Answer 20

Force acting through a displacement

Question 21

Heat

Answer 21

Form of energy that is transferred across the boundary of a system by virtue of the temperature difference between the system and the surroundings

Question 22

Cycle

Answer 22

Sequence of processes that begins and ends at the same state. All properties have the same values at the end and the beginning

Question 23

First law of thermodynamics

Answer 23

If any system undergoes a cyclic process, the sum of the net heat energy input and the net work input is zero

Question 24

Internal energy

Answer 24

Energy stored by particles of a substance