Advertisements
Advertisements
Question
Define the term ‘enthalpy’.
Advertisements
Solution
Enthalpy: Enthalpy of a system may be defined as the sum of the internal energy of the
system and the energy that arises due its pressure and volume.
APPEARS IN
RELATED QUESTIONS
How is enthalpy of sublimation related to enthalpy of fusion and enthalpy of vaporization?
Define the Enthalpy of fusion
Define the Enthalpy of atomization.
If the enthalpy of vaporisation of water at 100oC is 186.5 J.mol-1, the entropy of vaporization will be_____________ .
(a) 4.0 J . K-1. mol-1
(b) 3.0 J . K-l. mol-1
(c) 1.5 J - K-1. mol-1
(d) 0.5 J . K-l. mol-1
For a chemical reaction dS=0.035 kJ/k and dH=20kJ. At what temperature does the reaction turn nonspontaneous?
A system absorbs 640 J heat and does work of 260 J, the change in internal energy of the system will be
(a) +380J
(b) -380J
(c) +900J
(d) -900J
What will happen to the internal energy if work is done by the system?
Define Enthalpy of vaporization
A system absorbs 6 kJ of heat and does 1.5 kJ of work on its surroundings. The change in internal energy is __________.
