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will a catalyst change the enthalpy of a reaction in a chemical reaction?
No, a catalyst will not change reaction enthalpy. If it does so, then it is NOT a catalyst but a reactant in stead!
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 relation between hydration energy lattice energy and enthalpy of solution?
enthalpy change of solution=enthalpy change of hydration - enthalpy change of lattice
What must the temperature be for the gas to remain at a constant pressure?
"Constant pressure" means the pressure must not change.
How does the presence of a catalyst affect the enthalpy change of a reaction?
The presence of a catalyst affect the enthalpy change of a reaction is that catalysts do not alter the enthalpy change of a reaction. Catalysts only change the activation energy which starts the reaction.
What special name is given to a heat change at constant pressure?
Enthalpy
The heat content of a system at constant pressure?
Enthalpy
Heat exchange in chemical reactions is due to a change in what?
Enthalpy-The heat added to or loss by a system at constant 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.
When the portion of a pressure enthalpy diagram is beneath the saturation curve then?
The refrigerant is at constant pressure
will a catalyst change the enthalpy of a reaction in a chemical reaction?
No, a catalyst will not change reaction enthalpy. If it does so, then it is NOT a catalyst but a reactant in stead!
Choose the name and symbol for internal heat of a system at constant pressure?
enthalpy, H
What is fusion in chemistry?
The Fusion is the change in enthalpy for the conversion of 1 mole or 1 gram of a solid to a liquid, at constant pressure and temperature and is usually denoted as ΔHfus.
What happens to the pressure at locations moving vertically up or down a pH constant-enthalpy line?
the pressure remains the same
What is the formula for calculating constant pressure of heat capacity?
Cp = ΔH/ΔT = (ΔU+pΔV)/ΔT Where Cp is heat capacity at constant pressure, ΔH is enthalpy change, ΔT is temperature change, ΔU is total internal energy change, and pΔV is pressure multiplied by change in volume.
When is heat of a reaction equal to the enthalpy change of the same reaction?
I'm pretty sure its when the pressure remains constant. When the pressure is constant: q=delta U + P delta V The equation for delta H is: delta H = delta U +P delta V Therefore, when pressure is constant: delta H = q I think...
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
