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ddd [48]
3 years ago
13

Calculate the energy, in joules, to heat two cubes (silver and copper), each with a volume of 10.0cm, from 15 C to 25 C​

Chemistry
1 answer:
Julli [10]3 years ago
8 0

Answer:

For Silver , The heat absorbed = <u>246.75 J</u>

For Copper , The heat is =<u> 343.42 J</u>

<u />

Explanation:

The change in temperature is calculated by:

\Delta T=T_{2}-T_{1}

T2 = 25 C

T1 = 15 C

\Delta T=25-15

\Delta T=10^{0}C

The energy in Joules can be calculated using :

q=mc\Delta T

here , m = mass of the substance

c = the heat capacity

q = heat absorbed / released

We need to calculate the mass , In order to determine the value of "q".

<u>Calculation for Silver :</u>

<u><em>The mass is calculated from the density of the element.</em></u>

density of Silver = 10.5 g/ml (look at the table of density)

Volume of Cube = 10 cm^3 (given)

1 cm^3 = 1 mL

10 cm^3 = 10 mL

The mass can be calculated using the formula:

mass = density\times Volume

mass = 10.5\times 10

mass = 105grams

Insert the value of m , c, T in the equation.

for Silver the value of "c"= 0.235 J/gC (Look at the table)

q=mc\Delta T

q=105\times 0.235\times 10

<u>q=246.75J</u>

<u>Calculation for Copper:</u>

Again first calculate the mass of Copper.

Density of Copper = 8.92 g/ml

Volume = 10 mL

mass = density\times Volume

mass = 8.92\times 10

mass = 89.2grams

Insert the value of m , c, T in the equation.

for Silver the value of "c"= 0.385 J/gC (Look at the table)

q=mc\Delta T

q=89.2\times 0.385\times 10

<u>q=343.42J</u>

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