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See links below. See also Perry And Green's Chemical Engineering Handbook Page Chapter 2, page 2-273.
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How do you read pressure enthalpy chart?
by smoking 3 oz of crack and then u will understand it
Why you calculate enthapy?
Generally enthalpy is analgous to the energy of a material at a particular temperature and pressure. It is calculated to determine the energy a material holds, or more often, enthalpy differences are calculated to determine how much energy is required to bring a material from one temperature and pressure to another temperature and pressure.
What is the relationship between enthalpy and temperature?
Enthalpy is the amount of energy in a system and when this changes (when a reaction happens), the energy is either released (exothermic) or absorbed (endothermic) and this energy is usually released or absorbed as heat. Therefore when the enthalpy decreases, heat is released from the system making it exothermic. In contrast, when the enthalpy increases, heat is absorbed making it endothermic.
What is the physical significance of enthalpy?
it is the total energy required to create any system by displacing its volume and pressure.
Is the heat content of a system at a constant pressure?
Yes it is possible, for example when water freezes there is a point when the temperature remains constant however energy is released as the water condenses.
What characteristics of a substance is NOT affected by enthalpy and entropy?
Pressure is not affected by enthalpy and entropy.pressure
What determines the temperature at which a refrigerant vaporizes?
pressure / temperature / volume /enthalpy
Define enthalpy and how it is measured?
Enthalpy is a particular amount of heat that is produced or released at a given pressure. There are specific equations that must be used to calculate enthalpy.
The heat content of a system at constant pressure?
Enthalpy
When the portion of a pressure enthalpy diagram is beneath the saturation curve then?
The refrigerant is at constant pressure
which energy profile best shows that the enthalpy of formation of CS2 is 89.4 kJ/mol?
graph D
What special name is given to a heat change at constant pressure?
Enthalpy
What happens when the portion of a pressure-enthalpy diagram is beneath the saturation curve?
compression
Which energy profile best shows that the enthalpy of formation of CS2 is 89 4 KJ mol?
Graph D `WXM
What happens to the pressure at locations moving vertically up or down a pH constant-enthalpy line?
the pressure remains the same
When graphing enthalpy and entropy what variables are included?
Temperature and energy are two of the variables included when graphing enthalpy and entropy. Enthalpy is made up of the energy, pressure, and volume of a system. Entropy is a way to determine the different ways energy can be arranged.
Choose the name and symbol for internal heat of a system at constant pressure?
enthalpy, H
