Answer:
I think it would be Contagious.
Explanation:
You get it from another person or from food and thats contagious.
You have to use the equation q=mcΔT and solve for T(final).
T(final)=(q/mc)+T(initial)
q=the amount of energy absorbed or released (in this case 868J)
m=the mass of the sample (in this case 15.6g)
c= the specific heat capacity of the substance (in this case 2.41 J/g°C)
T(initial)=the initial temperature of the sample (in this case 21.5°C)
When you plug everything in, you should get 44.6°C.
Therefore the final temperature of ethanol is 44.6°C
I hope this helps. Let me know if anything is unclear.
Answer:
16.84 g
Explanation:
Assuming that the ethanol is free of water
the number of moles of ethanol to generate 500 KJ = 500 / 1368 = 0.3655 mol
molar mass of ethanol = 46.07 g/mol
mass of ethanol needed = 46.07 × 0.3655 = 16.84 g