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Is piston cylinder process is constant pressure process or constan volume process?
Wiki User
∙ 10y ago
A piston cylinder process actually includes two processes. The gas inside the piston undergoes both the constant pressure process and the contant volume process.
Wiki User
∙ 10y ago
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If a process is carried out at constant pressure P and the volume V of the system decreases then V is negative positive and the work w is negative positive zero?
In this case, V would be negative, and work w would be positive.
What is a process column?
A process column is a vertical cylinder in which a reaction takes place. The reaction is commonly one of filtering or selection, as measured by ionic charge; or molecular size and so on. Often an ion-exchange resin is used as the process material. A particular type of process column is the fractionating column, beloved of the petrochemical industry. These are tens of metres high, and rely on the fact that as the pressure reduces up the column, the boiling point of the (liquid) will change. Thus the high b.p material comes off lower down, and lower b.p. come off at higher levels.
What does attrition mean?
The action or process of gradually reducing the strength or effectiveness of someone or something through sustained attack or pressure.
Derivation for workdone in isothermal process?
In thermodynamics, an adiabatic process or an isocaloric process is a process in which no heat is transferred to or from working fluid. The term "adiabatic" literally means an absence of heat transfer; for example, an adiabatic boundary is a boundary that is impermeable to heat transfer and the system is said to be adiabatically (or thermally) insulated. An insulated wall approximates an adiabatic boundary. Another example is the adiabatic flame temperature, which is the temperature that would be achieved by a flame in the absence of heat loss to the surroundings. An adiabatic process which is also reversible is called an isotropic process.Ideal gas:For a simple substance, during an adiabatic process in which the volume increases, the internal energy of the working substance must necessarily decrease. The mathematical equation for an ideal fluid undergoing an adiabatic process is,p.v^( γ )where P is pressure, V is volume, andγ =CP/CV=α +1 / α .CP being the molar specific heat for constant pressure and CV being the molar specific heat for constant volume. α comes from the number of degrees of freedom divided by 2 (3/2 for monotonic gas, 5/2 for diatomic gas). For a monotonic ideal gas, γ = 5 / 3, and for a diatomic gas (such as nitrogen and oxygen, the main components of air) γ = 7 / 5. Note that the above formula is only applicable to classical ideal gases and not Bose-Einstein or Fermi gases.For the derivation of work done in an adiabatic process, please visit the link I added below.
When do you use a diaphragm seal What is the process of measurement and control?
Process measurement sensors are not indestructible. Not even the most rugged device is fully immune to the chemical nature of process media or the kinetic impact associated with fluid composition and movement. Balancing degrees of protection, usually to increase the useful life of the device, with sensor response and accuracy is a frequent challenge in the process measurement and control field. Industrial processes commonly are associated with corrosive or toxic fluids, often at extreme pressure or temperature and containing various levels of solids. Any of these traits can pose substantial risk to process performance and uptime. Operations that process fluids will employ pressure measurement devices to monitor process performance and maintain system safety levels. There are many instances where characteristics of the process and its media are not compatible with pressure measurement devices. Here are some potentially problematic scenarios for pressure measurement instruments: Corrosive media that will prematurely deteriorate the pressure sensing element. Viscous or fibrous media, also those that may crystallize or polymerize, posing a risk of clogging channels, tubes, and orifices of pressure measurement devices. Media temperature that is beyond the rated range for the pressure measurement device has a potential to damage the instrument or cause error in the pressure reading. A measuring point that is remotely located from where a technician may need to observe the reading. Also conceivable, the pressure measurement device needs to be located away from other potentially damaging environmental conditions. The process requirements dictate specific hygienic requirements that are cause for the measurement device to be isolated from the medium. Toxic or otherwise hazardous media that must be contained. Excursions of system pressure may exceed the acceptable range of the instrument, potentially damaging the device. A solution which can provide protection from the items listed above, while still maintaining instrument response and accuracy is a diaphragm seal. Seals are placed between the pressure measurement device and the process media. The space between the diaphragm, which is flexible, and the sensor is filled with a fluid that will hydraulically transfer the pressure condition on the process side of the diaphragm to the sensor. The diaphragm serves as a physical barrier between the potentially damaging media and the instrument. Diaphragm seals are available in a wide variety of configurations to accommodate any media type or connection requirement. Seal selection involves specifying the connections and form factor to properly mate the diaphragm with the instrument and the process, then selecting the diaphragm material that will be compatible with the media. The best way to achieve a positive solution is to share your requirements with a qualified assembler. They can help select the right diaphragm seal and mate it up with a pressure gauge, providing a complete assembly that is ready to be installed in your process.
What is isobaric process?
The process in which change in volume and temperature takes place at a constant pressure is called an isobaric process
What is constant in a polytropic process?
In Polytropic process the product of Pressure and Volume (PV) power 'n' is constant where, 'n' is polytropic index
What isothermal process?
Isothermal process is a process in which change in pressure and volume takes place at a constant temperature.
What is name of the thermodynamics process if the pressure is constant the volume increases the heat is lost?
isobaric process
How to calculate final pressure when given initial pressure and initial temp and also final temp and know that it's a constant volume process from initial state?
You can calculate pressure and temperature for a constant volume process using the combined gas law.
Which of the following is true of an isothermal process Temperature is constant W equals Q ΔU equals 0 Pressure is constant?
Temperature is constant.
What is Isochoric process?
Isochoric process is a process in which change in pressure and temperature takes place in such a way that the volume of the system remains constant.
What is isochoric?
Isochoric process is a process in which change in pressure and temperature takes place in such a way that the volume of the system remains constant.
What is flow and non flow process of first low of thermodynamics?
Steady flow processFluid flow in which all the conditions at any one point are constant with respect to timeFluid flow without any change in composition or phase equilibriaFlow velocities do not vary with timeExamples of steady flow process- groundwater and channel flows- turbine- fluid heater- orifice(throttling)- nozzleNon flow processA thermodynamic process involving no fluid flowExamples of non-flow process- Heating at constant volume- Adiabatic expansion in a cylinder- Free Expansion (Joules experiment - valve is initially closed and then opened to equalize pressures)- Heating a fluid in a cylinder at constant pressure
Why joule Thomson effect is not applicable for hydrogen and hellium?
As the gas flow from high pressure to low pressure using the porous plug the temperature of the gas increases as the pressure of the gas decreases. As we know in all this process the enthalpy is constant. As we know in all this process the enthalpy is constant . So, to stay it constant the internal energy increases which lead to increase in temperature of the gas. Formula h=u+pv h--- enthalpy u-- internal energy p--pressure v---volume
What is the total heat energy supplied in isobaric process?
An isobaric process is one occurring at constant pressure (we are talking about gases). So the specific heat to use is Cp, the specific heat of the gas at constant pressure. To get the total heat energy you obviously need to also know the quantity of the gas involved, and the change in temperature.
The elements of the earth are in a constant process of being?
constant process of being used.
