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Chemistry word problem. Please help. 10 points to best answer!?
A house is designed to have passive solar energy features. Brickwork is to be incorporated into the interior of the house to act as a heat absorber. Each brick weighs approximately 1.8 {rm kg}. The specific heat of the brick is 0.85 {rm{J}}/{rm{g}}cdot {rm{K}}.
How many bricks must be incorporated into the interior of the house to provide the same total heat capacity as 1700 gal of water?
you make it confusing with all the {rm} stuff... write it like this next time...
1.8 kg / brick
0.85 J/gC.. or 0.85 J/gK... ok?
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heat capacity of 1700 gal H2O....
1700 gal H2O x (8.314 lbs / gal) x (454 g / lb) x (4.184 J/gK) = 2.68x10^7 J/K
that must = heat capacity of the bricks...so that...
2.68x10^7 J/K x (1 g K / 0.85 J) x (1 kg / 1000g) x (1 brick / 1.8 kg) = 1.8x10^4 bricks. 2 sig figs...
***********
the math is called "factor label method" aka "dimensional analysis". do you need help with that?
