# Is molar enthalpy a state function

##### 2020-01-29 20:58

The enthalpy of formation for a pure element in its standard state is always negative. Enthalpy is a state function because its change depends only on initial and final conditions. Enthalpy is not a state function because its change depends on the identities of the reactants and products.How can the answer be improved? is molar enthalpy a state function

Ernest Z. Enthalpy is a state function because it is defined in terms of state functions. U, P, and V are all state functions. Their values depend only on the state of the system and not on the paths taken to reach their values. A linear combination of state functions is also

Oct 25, 2018  Enthalpy is a state function because it depends only on two thermodynamic properties of the state the substance is at the moment (like temperature and pressure, or temperature and entropy, or any pair of other state functions). It does not depend on Enthalpy is the heat content of a chemical system The molar enthalpy of reaction (Hrxn) is the amount of heat transferred during a reaction. It is reported in kilojoules per mole of reactant. Ais molar enthalpy a state function Determine an expression for the molar enthalpy of an ideal monatomic gas as a function of temperature. Start with the definition of enthalpy H E PV, and use the expression for the total energy of an ideal monatomic gas, E 32 RT and the ideal gas equation of state PV nRTAlso, for an ideal monatomic gas, work out an expression for Cp

The standard enthalpy of formation is defined as the change in enthalpy when one mole of a substance in the standard state (1 atm of pressure and 298. 15 K) Therefore, if the heat capacities do not vary with temperature then the change in enthalpy is a function of the difference in temperature and heat capacities. The amount that the is molar enthalpy a state function The excess partial molar enthalpy of the ith component is, by definition, eq. or an infinitely diluted state for the solute (molar enthalpy h 2 We first note that enthalpy is a function of temperature, pressure and the moles of species, n i, i 1, Recall that sublimation does not include the liquid phase and that the fact that enthalpy is a state function allows us to add the enthalpies of fusion and vaporization together to find the enthalpy of Jan 11, 2017  Enthalpy is considered a state function because its current value will only depend upon the final and initial values of heat in a reaction, but not the path or process that occurred for it Enthalpy is a state function and so the change from an initial condition to a final form will give a definite value regardless of the route taken. Because of this, the enthalpy change accompanying a reaction is obtained by summing the enthalpies of the products and subtracting the

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