EXPERIMENTS IN GENERAL CHEMISTRY Show your work for problems 6-7. 6. If the spec

Question

EXPERIMENTS IN GENERAL CHEMISTRY Show your work for problems 6-7. 6. If the specific heat of water is'hw many calories of heat are needed to increase the temperature of 75 g of water by 30 °C? #calories (#gram x # degrees temperature changed) Specific heat One mole of atomic units (atoms, molecules, ions, electrons, ete.) is 6.022 x 10 uni toms, molecules, ions, electrons, etc.) is 6.022 x 10b uni (like one dozen of anything is 12 items). The mass in grams of 6.022 x 10h atoms carbon is 12.00 grams or 1 mole or 1 gram atomic mass of carbon atoms 12.00 gr gra of carbon. We find the atomic masses for elements on the periodic table. moles of atoms ("gram" of atoms in sample # gram atomic mass) #moles ofmolecules = ('grams of melecules in.ample (gram molecular mass) a. 3gram atomic mass of sulfur atoms =- _ grams of sulfur? The mass in grams of 6.022 x 1023 molecules or a mole of sulfur dioxide (SO,) is (32.07 g+ (2xg)l or b grams?

Explanation / Answer

Energy ( in calories) = specific heat x mass (grams) x temperature change

given that, specific heat = 1 cal/g.oC
mass of water = 75 g
temperature change = 30 oC

=> Energy ( calories) = 1 cal/g oC x 75g x 30 oC

=> Energy (calories) = 2250 cal   <<<<<--------------(ANSWER)

2250 calories required to increase the temperature of 75 g of water by 30 oC.

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