5. The barometer falls when rain is coming and when climbing a mountain. B, B. A

Question

5. The barometer falls when rain is coming and when climbing a mountain. B, B. A piece of hot metal at 100°C is placed in a coffee cup calorimeter filled vw e metal. (Ignore the heat gained by the cup Mass of cup + water= 655g determine the specific heator Mass of cu f w r the experiment is given below. Use this data to Mass of cup= 250g Mass of cup + water + metal = 928 Initial temp. of water = 22rc Finaltemp, of (water) = 24.18/re metal = gC etal=93As 224g ,18J/rc Final temp, of metal/water mixture = 26

Explanation / Answer

heat lost by metal = heat gained by water

mass of metal*s*DT1 = mass of water*s*DT2

mass of water = 65.5-2.5 = 63.0 g

S = specific heat of water = 4.18 j/g.c

DT2 = 26.3-22.0 = 4.3

mass of metal = 93.4-65.5 = 27.9 g

s = specific heat of metal = x j/g.c

DT1 = 100 - 26.3 = 73.7 c

27.9*x*73.7 = 63*4.18*4.3

x = s = specific heat of metal = 0.55 j/g.c

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