What is the heat capacity of a 31 gram substance that releases -3452J of heat energy and has an initial
temperature of 100°C and a final temperature of 45.1°C?

2 J/g Celcius

Explanation:

Find delta T: final temp - initial temp

q=energy, m= mass, c= specific heat. delta T= change in temp

45.1 C-100 C= -54.9 C

Rearrange energy equation to solve of c (specific heat):

q=m*c*delta T   --> c=q/(m*delta T)

Now, just plug in the numbers:

c= (-3452J)/(31g*-54.9 C)

... to get

c=2J/(g C) (rounded to 1 sig fig due to the 100 stated in the original problem)

Hope that helps!

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.