How do you do this: Step by Step?

Question

200.0 Joules of heat is required to raise the temperature of an object sample by 3.00ºC. If the specific heat of the object is .01490 J/gºC, what is the mass of the sample in kilograms?

0.993 x 10-3 kg
4474.3 kg
4.474 kg
40.268 kg
0.067 kg


A 2.00-kg metal object requires 5020 J of heat to raise its temperature from 20.0°C to 40.0°C. What is the specific heat capacity of the metal?

126 J/(kg • °C)
106 KJ/(kg • °C)
126 cal/(kg • °C)
142 kcal(kg • °C)


1146 joules of heat is released when a 100.0 gram sample of an unknown metal cools from 95.00°C to 65.00°C. Determine the specific heat of a metal.

Answer 1

Specific heat is 'how much heat is required to raise the temp of 1 gram 1 degree C'

So, .01490 J raises 1 g 1 C

thus 3 x .0149 = .0447 J raises 1 g 3C

since you have 200 J can raise 200/.0447 = 4474 g 3C

=4.474 kg

5020 J / (2000g * 20C) = .1255 J/gC = 1000 * .1255 J / KgC

126 J/KgC

I think you should be able to figure out the last one...

Answer 2

I'm not going to DO them FOR you. You need to know how to read a problem and use the equation that I have you earlier to figure them out. Again, the equation is:

q=mc(delta T)

So, for your last question, it says 1146 joules of heat (that's "q") is released when 100.0 gram (that's "m") ...cools from 95C to 65C. (Delta T is 95-65).
Plug those into the equation and solve for "c" (the specific heat of the metal).

Good luck..You can do the others.

Answer 3

do no longer spank them. in spite of what all of us's ethical perspectives are on it, their mom would be pressing expenditures against you in case you do. i will inform you that for confident by employing what you're saying approximately her. You and your husband could desire to recent a united front right here, in spite of ways you come to a determination to handle it. And if he won't help you, that's somewhat helpful to take a protracted, stressful inspect your dating. this shouldn't flow away, or be trouble-free to come back to a determination. the significant element is, in spite of you come to a determination to do, stick to it, mutually, and don't lower back off. additionally, do no longer make a huge fuss approximately it. in the event that they have been advised "no television in case you do/do no longer try this or that", while they destroy the rule, quietly unplug the television and get rid of the distant from the room, with out notice. we've long gone so some distance as taking it out of the room altogether for something of the day with my daughter. She replaced into an angel for weeks after that. discover their weak point, and use it.