1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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>

You might be interested in
A reaction at -6.0 °C evolves 786. mmol of sulfur tetrafluoride gas. Calculate the volume of sulfur tetrafluoride gas that is co
borishaifa [10]

Answer:

V of Sulfur tetrafluoride is  17.2 L

Explanation:

Given data;

T = -6°C =  267K                                [1° C  = 273 K]

n = 786 mmol of SF4 which is 0.786 mol

P = 1 atm

from ideal gas law  we have

PV = nRT

where n is mole, R is gas constant, V is volume

V = \frac{nRT}{P}V = \frac{0.786 mol \times 0.082 atmL/mol K \times* 267K}{1atm} = 17.2 L

V of Sulfur tetrafluoride is  17.2 L

6 0
3 years ago
How does temperature change during a chemical reaction
snow_tiger [21]

A change in temperature is a sign that a chemical reaction has occurred. This occurs in an endothermic reaction. An endothermic process is any process which requires or absorbs energy from its surroundings, usually in the form of heat. It may be a chemical process, such as dissolving ammonium nitrate in water, or simply the melting of ice cubes.

Hopefully im not too late :/

6 0
2 years ago
If you have 5 grams of product after a chemical reaction, how many grams of reactants did you have at the start of the reaction?
Ierofanga [76]
You would have started with 5 grams of reactants
6 0
3 years ago
The table shows the average sleeping time of different organisms. According to the table above, the amount of sleep needed by hu
artcher [175]
Reduces from birth till old age is the answer because if you look at the chart, you can see that both the percentages and hours of total sleep time decrease as humans get older.
7 0
2 years ago
Some things that can be made from coal are...
aleksley [76]

Answer:A

Explanation:just casuse

6 0
2 years ago
Other questions:
  • If an atom has six electrons how many protons does it have
    8·1 answer
  • Which of the following is a strong base?
    15·1 answer
  • Initially, 0.740 mol of A is present in a 5.00 L solution. 2 A ( aq ) − ⇀ ↽ − 2 B ( aq ) + C ( aq ) At equilibrium, 0.200 mol of
    6·1 answer
  • How many of these substances are elements?
    14·1 answer
  • In two or more sentences describe how a constant volume Calorimetry is made, and how it is used to measure energy transfer
    9·1 answer
  • Is anime a good thing or a bad thing?
    13·1 answer
  • Cual es el propósito de la línea escalonada gruesa de la tabla periódica
    11·1 answer
  • How many grams of h2o are needed to produce 45g of NO
    13·1 answer
  • If a young girl learned that it would be 0° C, or 32° F, the next
    15·1 answer
  • What mass, in grams, of sodium sulfate is needed to make 234.9 g of a 1.7 % (m/m) aqueous solution of sodium sulfate?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!