J.R. S. answered • 11/06/21
Tutor
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(145)
Ph.D. in Biochemistry--University Professor--Chemistry Tutor
You've asked several of these same type questions. The answer is usually found by using
q = mC∆T.
q = (348 kg)(C for iron)(-19º)
Look up the specific heat for iron and use that value to find q
J.R. S.
tutor
No, you don't have to convert from Kelvin to C because the equation deals with a CHANGE in temperature (∆T) and not an absolute value. A 19º change in K is the same as a 19º change in celsius. And yes, you would want to report your final answer in kJ and that depends on what units you use for the specific heat. Sometimes it's given in J/gº or kJ/kgº, etc. And J/gºC is the same as J/gºK as pointed out above. No need to convert temperature.
Report
01/28/22
Georgia Y.
Wouldn't you need to convert kelvin to celsius and kg to grams since the specific heat uses the unit J/gºC and then convert J to kJ at the end to answer the question? If you do it this way, you get a different answer than the one you get if you solve it your way.01/28/22