## q=mCdeltaT

Valeria Viera 1B
Posts: 60
Joined: Fri Apr 06, 2018 11:05 am

### q=mCdeltaT

I’ve seen this equation written as q=nCdeltaT and q=mCdeltaT
Should we use moles or grams for this equation on the test?

Celeste 1I
Posts: 44
Joined: Fri Sep 28, 2018 12:18 am

### Re: q=mCdeltaT

Use the one that is easiest to use, I'm assuming. If they give you grams then use m and if they give you mols use n. Just make sure to then use the corresponding C. Write out your units to ensure you're getting the right answer and everything cancels out.

mahika_nayak_3L
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: q=mCdeltaT

Use either m or n depending on the units of the specific heat, C, that is given to you. That way your units can be consistent with one another and cancel out to give you a q value in terms of Joules.

MichelleRamirez_2F
Posts: 63
Joined: Fri Sep 28, 2018 12:28 am

### Re: q=mCdeltaT

If you are given moles then use n and molar heat capacity, nad if you are given mass (g) then use m and specific heat capacity of the substance.

IsabelLight2H
Posts: 34
Joined: Wed Oct 03, 2018 12:15 am

### Re: q=mCdeltaT

I would just make sure your final answer is in the units they ask for! Don't give moles if they ask for mass and vice versa!

Xingzheng Sun 2K
Posts: 62
Joined: Fri Sep 28, 2018 12:29 am

### Re: q=mCdeltaT

mC represents the specific heat capacity is measured in per unit of mass; nC means the specific heat capacity is measured per mole.

Posts: 64
Joined: Fri Sep 28, 2018 12:26 am

### Re: q=mCdeltaT

Use whichever the question is asking for, but if you are not given the molar heat capacity then convert the moles into grams and use specific heat capacity.

MichaelMoreno2G
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: q=mCdeltaT

What would be the final units for the equations? In other words, if we used moles, what would our final units be, and if we used m, what would our final units be? I get confused with the two.

varunhariharan
Posts: 30
Joined: Mon Jan 07, 2019 8:16 am

### Re: q=mCdeltaT

The units either way should be in Joules because the moles/grams unit will be cancelled in the equation by the specific heat capacity.

yuetao4k
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am
Been upvoted: 1 time

### Re: q=mCdeltaT

It depends on what units are given in the problem. Use whichever is simplest.

Nghi Nguyen 2L
Posts: 61
Joined: Fri Sep 28, 2018 12:18 am

### Re: q=mCdeltaT

i just look at the units for the specific heat, they should tell you to use grams or moles

Heidi Ibarra Castillo 1D
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

### Re: q=mCdeltaT

I assume if they give you grams you use m, if moles then youd use n.

805097738
Posts: 159
Joined: Wed Sep 18, 2019 12:20 am

### Re: q=mCdeltaT

if the equation uses the g variable then use grams. If it uses the m variable which is usually represented by n, use number of moles.

Posts: 103
Joined: Thu Jul 11, 2019 12:16 am

### Re: q=mCdeltaT

Either works! Choose whichever one is most convenient for the problem.

Keerthana Sivathasan 2E
Posts: 90
Joined: Wed Sep 18, 2019 12:22 am

### Re: q=mCdeltaT

Q=mcdeltaT can be used for any solid, liquid or gas, but specifically for gases, if you have constant volume, you can use the equation, nCvdeltaT, or constant pressure, nCpdeltaT. Cv and Cp both are called molar heat capacities.

Verity Lai 2K
Posts: 85
Joined: Sat Aug 24, 2019 12:18 am

### Re: q=mCdeltaT

If they give you the moles, use q=nCdeltaT, if they give you grams, use q=mCdeltaT. It depends on the information given.