An introduction to thermodynamicsGinn, 1910 - 136 lappuses |
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absolute temperature adiabatic expansion amount of heat atmospheric pressure boiler Carnot cycle Carnot efficiency cent Centigrade change in entropy clearance cold source compression condenser condition constant pressure constant volume coördinates corresponding cubic feet cubic foot curve cylinder dry steam efficiency engine equal equation expressed external Fahrenheit foot pounds friction gases given heat required Hence hot source increase in entropy intrinsic energy irreversible isentropic isothermal Joule's Law kinetic energy latent heat line of constant liquid loge mixture molecular molecules p-v plot p₁ P₂ perfect gas piston displacement pound of air pound of steam pound of water pounds absolute pounds per square pressure-volume plot Problem represented saturated Second Law Section Solution specific heat specific volume square inch substance superheat superheated steam t₁ Table Thermodynamics tion total heat contents transformation ture unit mass V₁ V₂ values vapor velocity zero
Populāri fragmenti
27. lappuse - It is impossible by means of inanimate material agency to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.
21. lappuse - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
22. lappuse - It is impossible for a self-acting machine, unaided by any external agency, to convey heat from a body of...
26. lappuse - A process which can in no way be completely reversed is termed irreversible, all other processes reversible. That a process may be irreversible, it is not sufficient that it cannot be directly reversed. This is the case with many mechanical processes which are not irreversible. The full requirement is, that it be impossible, even with the assistance of all agents in nature, to restore everywhere the exact initial state when the process has once taken place. . . . The...
22. lappuse - ... heat cannot of itself (that is, without the performance of work by some external agency) pass from a cold to a warmer body.
5. lappuse - Heat capacity is defined as the amount of heat energy required to raise the temperature of one mole or atom of a material by 1°C without changing the state of the material.
10. lappuse - ... no change of temperature occurs when air is allowed to expand in such a manner as not to develop mechanical power.
1. lappuse - If the Action of an agent be measured by its amount and its velocity conjointly ; and if, similarly, the Reaction of the resistance be measured by the velocities of its several parts and their several amounts conjointly, whether these arise from friction, cohesion, weight, or acceleration ; — Action and Reaction, in all combinations of machines, will be equal and opposite.
1. lappuse - If the Activity* of an agent be measured by its amount and its velocity conjointly; and if, similarly, the Counter-activity of the resistance be measured by the velocities of its several parts and their several amounts conjointly, whether these arise from friction, cohesion, weight, or acceleration ;—Activity and Counter-activity, in all combinations of machines, will be equal and opposite.
26. lappuse - ... 115. Since there exists in nature no process entirely free from friction or heat-conduction, all processes which actually take place in nature, if the second law be correct, are in reality irreversible. Reversible processes form only an ideal limiting case. They are, however, of considerable importance for theoretical demonstration and for application to states of equilibrium.