Answer:
Second one
Explanation:
I think it's the second cause there's no energy w/o heat. So it's the second.
Answer:
= 55.7g
Explanation:
12g of carbon burnt to produce 5x10^2KJ
So, 5x10^2KJ(12g/393.5KJ)=15.2g
Then mas of CO2 is 44g
So, 15.2g(12g/44g)=57.7g
Answer:
The ranking is given as; Water > Asphalt > Concrete > glass > Iron
Explanation:
The trick in solving this question is to assume a constant heat value; in this case i'll be choosing 100 J. Use this value to solve for the temperature difference. from that we can be able to rank the samples in order of their temperatures.
The formular to be used here is the;
H = MCΔT
Where;
H = Heat
M = Mass
C = Heat Capacity
ΔT = Temperature difference
ΔT = H/MC
In water;
ΔT = 100 / (10 * 4.184) = 2.39K
In Concrete;
ΔT = 100 / (10 * 0.88) = 11.36K
In asphalt;
ΔT = 100 / (10 * 0.920) = 10.87K
In glass;
ΔT = 100 / (10 * 0.84) = 11.9K
In iron;
ΔT = 100 / (10 * 0.448) = 22.3K
The samples with least temperature difference would have final temperatures and vice versa.
Our ranking is the given as; Water > Asphalt > Concrete > glass > Iron
