process variable part 2

Question 1

reference chosen by you for the calculations you plan to make in a particular problem

Answer 1

basis

Question 2

makes a problem much easier to solve

Answer 2

basis

Question 3

questions in selecting a basis

Answer 3

• what do I have to start with?
• what answer is called for?
• what is the most conventional basis to use?

Question 4

defined as a measure of thermal energy of the system, indicating the average kinetic energy of the molecules within it

Answer 4

temperature

Question 5

a property of the state of thermal equilibrium of the system with respect to other systems because it tells us about the capability of a system to transfer energy (heat)

Answer 5

temperature

Question 6

temperature units based on relative cale

Answer 6

Celsius and Fahrenheit

Question 7

temperature units based on absolute scale

Answer 7

Kelvin and Rankine

Question 8

normal (perpendicular) force per unit area

Answer 8

pressure

Question 9

used to measure pressure

Answer 9

barometer

Question 10

unit of pressure

Answer 10

Pascal (Pa = N/m^2)

Question 11

normal atmospheric pressure

Answer 11

101,3225 Pa = 1 atm

Question 12

the pressure on the earth’s surface, which is the result of the air’s weight above the surface

Answer 12

atmospheric pressure

Question 13

the pressure that is considered absolute zero pressure or perfect vacuum as its reference point

Answer 13

absolute pressure

Question 14

the difference between the measured pressure and the local atmospheric pressure

Answer 14

gauge pressure

Question 15

difference between two applied pressure

Answer 15

differential pressure

Question 16

pressure that is exerted by a fluid at equilibrium at a given point within the fluid due to the force of gravity

Answer 16

hydrostatic pressure

Question 17

the height of the hypothetical column of this fluid that would exert thee given pressure at its base if the pressure at the top were zero

Answer 17

pressure head

Question 18

the pressure of any fluid (especially liquid) can be calculated using its density and the height of the fluid

Answer 18

derivation for pressure

Question 19

derivation of pressure formula

Answer 19

P = F/A = pgh

Question 20

derivation for pressure where the fluid is exposed to the atmosphere formula

Answer 20

P = pgh + Po

Question 21

relationship between pressure terms

Answer 21

P absolute = P gauge + P atmospheric

P vacuum = P atmospheric - P absolute

Question 22

U-shaped tube partially filled with a fluid of known density

Answer 22

manometer

Question 23

when the ends of the tube are exposed to different pressures , the liquid level drops in the high-pressure arm and rises in the low-pressure arm

Answer 23

manometer

Question 24

It provides a quantitative means of relating the amount of products produced by a chemical reaction(s) to the amount of reactants or vice versa

Answer 24

stoichiometry

Question 25

Chemical reaction equation provides information of two types

Answer 25

- It tells you what substances are reactants and what substances are products. - The coefficients of a balanced chemical reaction equation tell you what the mole ratios are among the substances that react or are produced.

Question 26

the relative amounts of moles of chemical species that react and are produced by the reaction

Answer 26

stoichiometric coefficients

Question 27

the relative proportions of products and reactants

Answer 27

stoichiometric ratio

Question 28

the exact amount of a reactant or product required in a chemical reaction, based on the stoichiometric coefficients in a balanced chemical equation

Answer 28

stoichiometric quantity