Question

30 ml of water

Iron Aluminum 21,20°c 23.40°C Average initial temperature 20.90 of H:0 (0-3 minutes) Highest temperature attained 22.50 by H(5-8 minutes) 1.58 0.79 Change in H;O temperature, AT - 202.06.94 3.37 Heat absorbed by H:0, que Heat transferred by metal, metal Change in metal temperature AT metal Specific Heat of metal, C, 0.93 c 2.00 3.97 854256, el of water equal to gran Calculations: 4T=Final T - Average T AT-23.20-22-2721,20 AT = 22.48-21.6420.90 AT=0.93€ 2.00°C AT: 1.58"C 2.00°C qabs (specific heat of water (mass of water) (AT) - S0156 (4.184 JgX 1.02 g/mL) 1.946) 1.0ty')0430 = 3.3716.745 - 3.975 (4.164547(30.69)(1.584)=202.295 8.500 5 =-(4.1845 1C) (30.6 gtxt) (2.000) Which metal has the highest specific heat? =256.06J Explain why one metal has a higher specific heat than the other. 2. Having determined the specific heat of both metals predict whether or not the heat of stone would be greater than, less to or equal to iron. Explain your answer.

Answer 1

The whole game is to understand the meaning of specific heat, let me explain you briefly and this explanation will clear the air.

The thermal motion of particles is the measurement of its temperature, more is the thermal motion more is the temperature.

These thermal motions are seen as energy stores, for example, if you heat water in pan, and bare pan, you will observe the rise in temperature in bare pan is much faster than that of water. reversibly if you have a pan and a pan with water both at the same temperature and you leave for 10 minutes to cool down, you will notice that Pan has attained the room temperature at faster rate than water. So, these suggest that pan gains heat faster and also looses heat at faster rate. This I would scientifically called that pan has lower specific heat than water, that means it requires less energy to show rise in temperature and that also means that it would loose the heat at faster rate too.

Now why not water? the reason is that in case of pan the particles are very tightly bound (high density) and so when they gain heat, they can not show more vibrations (less space available) as compared to water.  scitificaly that, as result it transfer the heat fastly to the thermometer due to which we see a rise in temperature while this process is slower in case of water, as water molecules are more free to vibrate and move.

Now in your experiment the highest temperature is attained by the water in case of iron, that means water has gained more heat from iron as compared to aluminium or in simple words, iron was unable to hold that heat and so it was gained by water. Therefore Iron has lower specific heat than Al.

Now both are metals but the metal with more density will have more specific heat in general, density depends on packing in their solid state.

If we compare stones, will always be higher than that of metals because in case of stones, these are ionic (consists of positive and negative charged ions) as a result the there will be alternate +ve and -ve ions arranged in solid state, but next to their neighbour they will find the same charge and due to which they will not as closely packed as we expect due to which there is large space left for the motion of the particles and so they have higher specific heats in case of metals they are packed with neutral atoms and so are very tightly bound and very less space is left for vibrations, that is why they have less specific heat.