# Physcial Science Unit II

 The flashcards below were created by user khardbarger on FreezingBlue Flashcards. A change of 100 degrees on a Celsisus scale is equal to how much on a Fahrenheit scale? 180 0 degrees on a Celsius scale corresponds to what reference point? The ice point The amount of heat required to raise 1 kg of water by 1 degree Celsius is called A kilocalorie The amount of heat requred to raise 1 kg of any substance by 1 degree Celsius is called The specific heat The amount of heat required to produce a phase change for 1 kg of any substance at the melting point is called Latent Heat of Fusion The first law of thermodynamics is based on The law of conservation of energy Applying the first law of thermodynamics to a gas in a cylinder with a movable piston and assuming the gas itself remains at a constant temperature, any heat added to the gas would produce work done by the gas to move the piston The 2nd law of thermodynamics implies that Heat can be utilized to do work only if a thermal reservoir at a lower temperature is available. Applying the 2nd law of thermodynamics to a fridge, we should expect that Energy must be supplied to it or it won't cool The ideal efficiency of a heat engine is dependent on The temperature of the hot reservoir and the cold reservoir between which the engine operates How close have scientists come to reaching an absolute zero on the Kelvin temperature scale? To within about one-billionth of a Kelvin Insulating houses by filling the space between the inside and outside walls with a material such as fiberglass is done mainly to reduce heat transfer through the space by Conduction and Convection Which process is due primarily to convection? The flowing of air from over cool water toward a warmer land area The amount of heat that flows from one solid body at a high temperature to another at a lower temperature is NOT influenced by The difference between their specific heats Radiation is the only possible means of energy transfer in Outer space, where all matter is essentially absent Heat would escape most readily through the high vacuum reg between the double walls of an unsilvered thermos bottle by Radiation Heat is transerred through solids primarily by the process of Conduction If very high temperatures cause the electrons to be separated from individual atoms and molecules, the material is then said to be in what phase? Plasma When material is found to have a definite volume, but no definite shape, and when it assumes the shape of any container its placed in, it is in what phase? Liquid If heat is added to a substance, but the temperature of that substance doesn't increase, we can conclude that the substance is undergoing a phase change The kinetic theory involves the motion of small, independent, indivisible particles (molecules) In SI units, pressure is expressed in N/Msquared or Pascals The ideal gas law deals with Volume, pressure, and temperature changes in gas samples When the temperature of a car tire increases as you drive on a long trip, the pressure in the tire should increase as long as the volune doesn't change Authorkhardbarger ID106278 Card SetPhyscial Science Unit II DescriptionTest 2 Updated2011-10-04T04:30:48Z Show Answers