Home › CBSE Class 11 › Thermodynamics & Kinetic Theory › Hess's law of constant heat summation is a direc…
Hess's law of constant heat summation is a direct consequence of:
ABoth the first and second laws together
BEnergy being a path function
CThe system being adiabatic
DEnthalpy being a state function
Answer & Solution
Correct answer: D. Enthalpy being a state function
Hess's law states that the enthalpy change for a reaction depends only on the initial and final states, not on the route taken. This is exactly the statement that enthalpy is a state function. It lets us add and subtract thermochemical equations to obtain the enthalpy of reactions that are difficult to measure directly.
Related questions
The combination of heat minus work is described as:Which law forbids a book on a table hopping up by itself?In an isochoric process the heat absorbed goes entirely to change:In an isochoric process, the work done is:In an adiabatic process, work done by the gas decreases its:In an adiabatic process, the heat absorbed or released is:A process at constant volume is called:A process at constant pressure is called: