A piece of solid aluminum at 15.0°C is immersed in 25.8 g of oxygen gas which is initially at 42.2°C and the system is allowed to equilibrateGiven that the specific heat of solid aluminum is 0.908 J/K/g and the specific heat of oxygen gas is 0.92 J/K/g, what is the mass of the piece of solid aluminum if the final temperature is 28.9°C?
You want things that wont conduct heat away from the container of boiling waterSo things that trap air work wellThats what house insulation does is trap lots of pockets of airI dont know what is allowed but, how about goose feathers (down) or woodHow about a bag of air? Here is a funny one: how about another giant pot of boiling water?
Fibre glass wool, the kind of stuff used for the oven of a gas cookerYou have to be careful with handling that stuff.
That fluffy stuff in house insulationI hope you know what I mean.
What Materials Keep Heat In
We know that the energy that leaves a system equals the energy acquired by the other systemIt is represented as: Q -Q( negative sign will not matter at the end.) So, we can write the equation as: smΔT-(smΔT) (0.908 J/g-K)(mass of aluminum)(13.9°C)-(0.92 J/g-K)(25.8g)(13.3°C) (12.6212 J/g)(mass of aluminum) -315.6888 J mass of aluminum -25.012582 g round to proper significant figure: 25 g There you have it, 25 g of Al was used.
