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Physics 18 Online
OpenStudy (anonymous):

Quick Physics Review Questions!! What is true about heat capacity and specific heat? Only heat capacity accounts for mass. Both heat capacity and specific heat account for mass. Neither specific heat nor heat capacity accounts for mass. Only specific heat accounts for mass. My answer is that both account for mass?

OpenStudy (anonymous):

@roadjester

OpenStudy (anonymous):

@wolfe8

OpenStudy (wolfe8):

Let's see. Heat capacity is the measurable physical quantity of heat energy required to change the temperature of an object by a given amount. Specific heat capacity the amount of heat per unit mass required to raise the temperature by one degree Celsius. What do you think?

OpenStudy (anonymous):

only specific heat accounts for mass?

OpenStudy (wolfe8):

Yup hence the name 'specific'

OpenStudy (anonymous):

cool Which of the following factors is not used in calculating the specific heat of a substance? mass temperature change heat required for a temperature change --> melting point??

OpenStudy (wolfe8):

Yup

OpenStudy (anonymous):

awesome! The amount of heat needed to raise 250 g of a substance by 15 K is 2,930 J. What is the specific heat of the substance ? 0.78 11,000 --> 780 ? 1.1 × 10^7

OpenStudy (wolfe8):

Looks like it.

OpenStudy (roadjester):

\[\huge Q=mc\Delta T\]

OpenStudy (anonymous):

ohh I used the specific heat capacity equation :/

OpenStudy (wolfe8):

You are supposed to.

OpenStudy (anonymous):

they've given me specific heat capacity and specific heat alone

OpenStudy (anonymous):

either way its 780 though? because both equations got me 780 approximately

OpenStudy (wolfe8):

How can you get the same? Specific heat capacity=2930/(15*0.25) Heat capacity=2930/15

OpenStudy (anonymous):

If 50 g of liquid water [C = 4,180 J/(kgK)] changes temperature in a calorimeter from 298 K to 348 K, then how much heat is transferred? --> 10.5 J ? 10.5 kJ 72.7 J 100 kJ

OpenStudy (wolfe8):

You said 3 questions. Is this a test? Either way, you should be able to do them from here

OpenStudy (anonymous):

specific heat capacity is C=q/ m delta T specific heat q=mCdeltaT

OpenStudy (anonymous):

no this isn't a test its just a review sheet for the test I have tomorrow

OpenStudy (anonymous):

I meant 4 sorry and well I'm stuck on 4

OpenStudy (anonymous):

can you help me with question4?

OpenStudy (anonymous):

If 50 g of liquid water [C = 4,180 J/(kgK)] changes temperature in a calorimeter from 298 K to 348 K, then how much heat is transferred? --> 10.5 J ? 10.5 kJ 72.7 J 100 kJ

OpenStudy (anonymous):

or 10.5 kJ?

OpenStudy (nincompoop):

heat capacity = Q = mc(T2-T1)

OpenStudy (nincompoop):

measure everything in kg

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