Delta H and qp

[MaryBanh_2K]

When can we assume enthalpy (delta H) and heat (qp) are equal? Can we always use them interchangeably? Why or why not?

[005391550]

you can assume they are equal when the pressure is constant. im not completely sure why but i think by definition, enthalpy is the change in heat at constant pressure

[LBacker_2E]

You said you can make assumptions about delta H when pressure is constant, so can you make assumptions about internal energy when volume is constant? If so, what would they be?

[Shutong Hou_1F]

I think that delta H = qp, because "qp" means heat transferred under constant pressure. And by definition, change in enthalpy equals the heat absorbed or released at constant pressure.

[Zoe Gleason 4F]

You said you can make assumptions about delta H when pressure is constant, so can you make assumptions about internal energy when volume is constant? If so, what would they be?

If the volume is constant, then work will be equal to 0. The internal energy equation will then be ΔU= q.

[Madeline Phan 1E]

you can assume that when pressure is constant.

[Hannah Pham]

ΔH = qp when pressure is constant.

[Maika Ngoie 1B]

Delta H is only equal to qp under constant pressure considering that is what qp means, but the two should not be used interchangeable.

[Hailey Kim 4G]

Delta H is equal to q when the heat released or absorbed is at a constant pressure.