Delta U vs Delta H

[Kate Swertfager]

What’s the difference between the delta U and delta H? How do I know when to use which one?

[Angela Wu-2H]

Delta U is the change in internal energy; meanwhile, delta H is enthalpy, or the change in heat.

[claudia_1h]

Delta U is given by the energy supplied to the system by heat (q) plus the energy transferred by compression work (w). When the system is under constant pressure, q is equal to Delta H, so Delta H becomes a part of how Delta U is calculated.

[Aarushi Solanki 4F]

Delta U indicates internal energy, and is composed of both delta H (enthalpy) and work. When no work is done, Delta U is equal to delta H. When no energy is transferred through heat and delta H is therefore 0, then Delta U is equal to work.

[Radha Patel 4I]

DeltaU is change in internal energy
DeltaH is change in enthalpy
The basic formulas that they derive from :
DeltaU= q + w
DeltaH=DeltaU + P*DeltaV