q vs deltaH

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JChen_2I
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

q vs deltaH

Postby JChen_2I » Tue Jan 28, 2020 3:40 pm

Could someone explain the difference between q and deltaH please? Thank you!

Ally Huang- 1F
Posts: 103
Joined: Thu Jul 25, 2019 12:16 am

Re: q vs deltaH

Postby Ally Huang- 1F » Tue Jan 28, 2020 3:44 pm

Delta H is the change in heat energy at a constant pressure. Heat is the transfer of energy due to difference in temperature. Delta H will equal q when there is a constant pressure.

Eunice Nguyen 4I
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Re: q vs deltaH

Postby Eunice Nguyen 4I » Tue Jan 28, 2020 10:33 pm

JChen_2I wrote:Could someone explain the difference between q and deltaH please? Thank you!

q= transfer of thermal energy from hot to cold objects until thermal equilibrium is reached
delta H = change in heat energy

Miriam Villarreal 1J
Posts: 105
Joined: Sat Aug 17, 2019 12:16 am

Re: q vs deltaH

Postby Miriam Villarreal 1J » Wed Jan 29, 2020 8:25 am

q is the amount of heat transfered to the system. It is one of the two means of energy transfer during most processes studied in thermodynamics. Delta h is a thermodynamic potential, much like internal energy (E). It is essentially a measure of the potential energy of the system

Justin Sarquiz 2F
Posts: 106
Joined: Fri Aug 30, 2019 12:15 am

Re: q vs deltaH

Postby Justin Sarquiz 2F » Wed Jan 29, 2020 8:38 am

q is not always heat transfer from a hot object to a cold object. q can be either positive or negative depending on the situation.

Angela Patel 2J
Posts: 110
Joined: Sat Aug 24, 2019 12:17 am

Re: q vs deltaH

Postby Angela Patel 2J » Wed Jan 29, 2020 5:06 pm

why would q ever not be equal to delta H?

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

Re: q vs deltaH

Postby gabbymaraziti » Wed Jan 29, 2020 7:25 pm

q represents the transfer of heat to or from the system. Delta H represents the sum of the internal energy in the system, taking into account the system's pressure and volume when necessary.


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