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4. How many J and cal are needed to heat 250 mg of graphite from -20 °C to 150°C? 5. How many cal are needed to bring 1750 g
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Answer #1

0 Specific heat. capacity of cgv) = 0;32 DH= neodt AH = C dT = 0.7205/7 ex(150–6-30)) c. = 0.920 39 x 170 =122-4 J 19. for 2534.79 I CL FW coff lg. ----------50°C - 11-sec AH = odt Seneca . . this data for calculation c are cod T 34J F mm 0.904519 ex

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