Ch 4 review

_____ is the method by which heat is transferred from one substance to another through a circulating medium, such as air or water.

Convection

____ is the rate at which work is performed.

Power

Temperatures measured on the ____ scale be converted to Fahrenheit temperatures by subtracting 460F

Rankine

The ____ system is the modern version of the metric system.

SI

A ton of refrigeration effect is defined as the _____ .

amount of heat energy absorbed when a ton of ice melts during one 24-hour day

Latent heat is heat added to a substance that _____.

causes the substance to change state

The density of a substance is defined as the mass of the substance _____ .

divided by its volume

The law of conservation of energy states that ____ .

energy can be changed from one form to another, energy cannot be created, energy cannot be destroyed

The weight of a substance is defined as the mass of the substance _____ .

force of gravity acting on the substance

Relative density is defined as the ratio of the mass of a certain volume of a gas as compared to the mass of an equal volume of hydrogen. Knowing this concept and that density is mass per volume, a heavy gas would then have a relative density _____ .

greater than 1

If a substance has a specific gravity less that 1.0, it means that the substance is _____ .

less dense than water

The two main classifications of energy are _____ .

potential and kinetic

Heat energy can be categorized as latent heat and _____ heat.

sensible

Objects that float on water have a _____ .

specific gravity less than 1

The ____ of a substance is the amount of the heat added or released to change the temperature of 1lb of the substance by 1F of the substance by 1K.

specific heat capacity

Enthalpy is the ____ .

total amount of heat in a substance, calculated from an accepted reference temperature.