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The property that describes heat change at constant pressure is known as enthalpy (H). When a system undergoes a process at constant pressure, the heat exchanged is equal to the change in enthalpy (ΔH). This relationship is crucial in thermodynamics, particularly in chemical reactions and phase changes, where it helps quantify the energy absorbed or released during the process.
What else can I help you with?
What must the temperature be for the gas to remain at a constant pressure?
"Constant pressure" means the pressure must not change.
What property describes the ability of a substance to change into other substances?
chemical property.
Which term describes how much energy it takes to change a substance?
The term that describes how much energy it takes to change a substance is "enthalpy." Specifically, it refers to the heat content of a system and is often used in the context of phase changes, such as melting or boiling. The energy required for these changes at constant pressure is known as the "enthalpy of transformation."
Is qrxn delta h of reaction under the same pressure?
Yes, ( q_{rxn} ) (the heat of reaction) is equal to the change in enthalpy (( \Delta H )) of the reaction when measured at constant pressure. This is because, under constant pressure conditions, the heat exchanged in a reaction corresponds directly to the change in enthalpy. Thus, ( q_{rxn} = \Delta H ) at constant pressure.
As pressure increase what does volume do?
since PV=nRT and we assume that the number of moles and temperature remains constant, we can assume that PV=R as R the gas constant will not change, if pressure is increased, then volume must decrease to counteract the change in pressure
What type of property is a change of state?
Change of state of a substance is a physical property!
Is it true that an equilibrium constant is not changed by a change in pressure?
Yes, it is true that an equilibrium constant is not changed by a change in pressure.
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 volume and pressure change in a tire after a long drive?
The volume is constant. The pressure will increase.The volume is constant. The pressure will increase.
What special name is given to a heat change at constant pressure?
A heat change at constant pressure is called enthalpy change, often denoted as ΔH. It represents the change in total heat content of a system during a process occurring at constant pressure.
How do isobars measure air pressure?
Isobars are not measured. An isobar describes a part of a thermodynamic process during which the pressure doesn't change. It is also used as a term in graph tables where it describes the behavior of a material at a constant pressure.
The property of matter that describes its ability to change into new matter with different properties is known as?
Energy is the ability to cause a change in matter.
Which of the follwing terms describes a variable that does not change in an experiment?
Constants
Is inflammability physical or chemical change?
Inflammability describes a chemical property (a chemical change).
What property describes the ability of a substance to change into other substances?
chemical property.
What are the properties of an incompressible substance and how does it affect the behavior of fluids?
An incompressible substance is one that does not change its volume when pressure is applied. This property affects the behavior of fluids by ensuring that their volume remains constant even when pressure is exerted on them. This leads to the conservation of mass and the maintenance of a constant flow rate in incompressible fluids.
What is the formula for calculating the change in pressure when the volume and temperature of a gas are held constant?
The formula for calculating the change in pressure when the volume and temperature of a gas are held constant is: P (nRT/V)T, where P is the change in pressure, n is the number of moles of gas, R is the gas constant, T is the temperature, V is the volume, and T is the change in temperature.
