I am attaching x2 pages from a book in which mixing & exothermic heats encountered is given as an example. I believe there is an error in calculation which I have annotated in pdf. Can anyone review?
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Sulphuric Acid & Water Mixing Heats. Is It A Typo Error
#6
Posted 26 June 2023 - 07:00 AM
@breizh
Thank you, your time meant a lot for me. Thanks again
Calculate the heat, Q, that needs to be transferred to return the mixture to 77 оF
Mixture - 60% w/w H2SO4
enthalpy 60% H2SO4 at 144 oF - (-86)
enthalpy 60% H2SO4 at 77 oF -(-121)
Were is the error?
#8
Posted 27 June 2023 - 09:24 AM
@breizh
Thank you, your time meant a lot for me. Thanks again
Calculate the heat, Q, that needs to be transferred to return the mixture to 77 оF
Mixture - 60% w/w H2SO4
enthalpy 60% H2SO4 at 144 oF - (-86)
enthalpy 60% H2SO4 at 77 oF -(-121)
Were is the error?
Thanks for correcting us. So if I explain it in words: The 60% solution [the final product via mass balance] is assumed to be adiabatically heated [heat comes from dilution] from 77F to 144F
Edited by IonCube, 27 June 2023 - 09:28 AM.
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