Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    4
    ReputationRep:
    Hi, i'm about confused about the difference between enthalpy and internal energy, could anyone help me understand it?

    Also, why is delta U measured in calorimetry, not delta H? Is it because calorimeters are constant volume?
    • Study Helper
    Offline

    0
    ReputationRep:
    Study Helper
    (Original post by jacksonmeg)
    Also, why is delta U measured in calorimetry, not delta H? Is it because calorimeters are constant volume?
    Yes. ΔH = ΔU + pΔV, so when the V=const ΔV=0, and ΔU=ΔH.

    And that's actually the difference between the ΔU and ΔH - one takes into account volumetric work, the other doesn't.
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.