Gas - Total Fall and Grade Btu Calculations Gas Laws Flashcards

1
Q

The amount of energy it takes to raise one pound of a substance 1°F is the definition of?

A

Specific heat.

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2
Q

The heat required to change the state of a substance is the definition of?

A

Latent heat.

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3
Q

The heat required in order to change the temperature of a substance is the definition of?

A

Sensible heat (Heat that can be sensed by a thermometer).

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4
Q

The amount of energy it takes to raise one pount of water 1°F is the definition of?

A

Btu.

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5
Q

What are the three variables used when dealing with the gas laws?

A

Pressure.

Temperature.

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6
Q

Of the three variables used when dealing with the gas laws which ones need to be put into absolutes before you are able to work with them?

A

Pressure.

Temperature.

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7
Q

How do you change pressure and temperature variables into absolute?

A

°Kelvin = °Celcius + 273.

°Rankine = °Fahrenheit + 460.

Absolute pressure = gauge pressure + atmospheric pressure (14.7 psia).

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8
Q

What are the names of the three gas laws and what are their formulas?

A

Boyle’s Law = P1 x V1 = P2 x V2

Charles Law = V1 ÷ T1 = V2 ÷ T2

Gay-Lussac’s Law = P1 ÷ T1 = P2 ÷ T2

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9
Q

What is the formula for the combined gas law?

A

P1 x T2 x V1 = P2 x T1 x V2

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