Chemical Forums

Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Frederick95 on March 06, 2008, 03:14:59 PM

Title: Rearranging the formula q = mc delta T
Post by: Frederick95 on March 06, 2008, 03:14:59 PM

What mass of water could be heated from 0 to 50 degrees Celcius by the addition of 8.00 kJ of heat?

I know the formula for quanitiy of heat transferred in joules(J) is q = mc deltaT

However, how would I rearrange the formula to be able to solve for mass (m)?

Title: Re: Rearranging the formula q = mc delta T
Post by: ARGOS++ on March 06, 2008, 03:36:28 PM

Dear Frederick95;

Which value of your Equation are you missing? Possibly c =  4.1840 kJoule kg^-1 °K^-1 ?
(I think “Rearranging” you learned in primary class 4, or 5, or so.)

Good Luck!
                    ARGOS⁺⁺

Title: Re: Rearranging the formula q = mc delta T
Post by: Frederick95 on March 06, 2008, 03:37:54 PM

So how is the formula rearranged to find m?

Title: Re: Rearranging the formula q = mc delta T
Post by: ARGOS++ on March 06, 2008, 04:24:29 PM

Dear Frederick95;


   q =  c * m * ΔT    ---->   q /  ΔT  =  c * m   ---->   q /  ΔT  / c  =  m !!   
(Looks that soooo complicated?)

Good Luck!
                    ARGOS⁺⁺