Which of the following can heat up a 500g sample of roo-temperature water the most: 200g of rock at 100C, 200g of steel at 100C, or 200g of water at 100C?
a) Design an investigation to answer this question. (The masses should be equal, but they don't have to be 200g.)
i think i know the answer but i need to know if i'm right or not so help me, plz. (I think its steel b/c it's a metal and they conduct heat very well.)
2007-11-21 12:26:22 · 1 answers · asked by caramel 1 in Science & Mathematics ➔ Earth Sciences & Geology
In order, they would be: water(greatest temp rise), steel and rock. this is not related to the conductivity; but to the specific heats of the three materials. Water woiuld carry much more heat than steel or rock of the same temperature. By calculation, the temperature rise of the water/water would be
(500*293 + 200*373)/700 = X
(the 293 and 373 refer to the degrees KELVIN)
The specific heat of water is defined as 1 deg per g.
The specific heats of steel and rock would be considerably less (look them up in a chem data book, or on google or wikipedia), and the above equation would have to be adjusted by multiplying by the specific heat (which would be less than 1).
Design an experiment to measure the resultant temperature of the water /rock, water/steel or water/water mix in a calorimeter. If the rock or steel is in granular form, the water will heat up quicker - than if they are in a big piece.
2007-11-21 15:32:26 · answer #1 · answered by AndrewG 7 · 0⤊ 0⤋