Question

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.

Answer 1

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

Answer 2

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.