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zvonat [6]
4 years ago
7

It requires 350 joules to raise a certain amount of a substance from 10.0°C to 30.0°C. The specific heat of the substance is 1.2

J/g°C.
Physics
2 answers:
Akimi4 [234]4 years ago
6 0
I'll assume you are looking for the mass of the object, since that is the missing piece of the puzzle.

The important equation for heat and energy is

Energy = mass × specific heat × change in temperature

Things we know:
Energy needed is 350 J.
Specific heat = 1.2 J/g°C
Temp. change = (30-20)°

Now we just need to plug those in and rearrange the formula to find the mass!

350 = mass × 1.2 × 10
Ivanshal [37]4 years ago
6 0

Answer:

The amount of the substance is 14.6 g.

Explanation:

Given that,

Energy = 350 J

Temperature T_{1}=10.0^{\circ}\ C

Temperature T_{2}=30.0^{\circ}\ C

Specific heat capacity = 1.2 J/g^{/circ}[/tex]

We know that,

The formula of specific heat is defined as

Q = mc\Delta T

Where,

m = mass of the substance

c = specific heat capacity

\Delta T = Temperature change

Put the value into the formula

350=m\times 1.2\times(30-10)

The amount of substance is

m =\dfrac{350}{1.2\times(30-10)}

m =14.6\ g

Hence, The amount of the substance is 14.6 g.

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