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
netineya [11]
3 years ago
10

How much energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C?

Chemistry
1 answer:
USPshnik [31]3 years ago
7 0

Answer:

1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C

Explanation:

Crayon is paraffin wax. The specific heat of paraffin wax is 2.14 J/g°C

As we know

Q = m*c *\Delta T

Where

\Delta T is the change in temperature T_2- T_1

m is the mass of the object

c is the specific heat in J/g°C

Substituting the given values, we get -  

Q = 30 * 2.14 *(49-25)\\Q = 1540.8    Joules

1540.8 Joules of energy is required to bring a 30 gram crayon from room temperature, 25 degrees C, to its melting point 49 degrees C

You might be interested in
Which condition must be met in order for an equation to be balanced? The elements in the reactants are the same as the elements
Nookie1986 [14]

Answer:

There must be an equal amount of each element on both sides of the equation.

Hope this helps

good luck

8 0
3 years ago
Read 2 more answers
What is the mass of 6.2 mil of K2CO3
Oksi-84 [34.3K]

Answer:

6.2 moles of K2CO3 can be converted to 856.8741 grams.

6 0
3 years ago
The half reaction of an oxidation-reduction shows that iron gains electrons. What does this electron gain mean or iron?
ale4655 [162]

Answer:

C. its reduced

Explanation:

4 0
3 years ago
According to Newton's third law, forces come in pairs. There is_____and an equal and opposite_____.
hichkok12 [17]

According to Newton's third law, forces come in pairs. There is action-reaction force and an equal (in size - action force) and opposite in direction (reaction force).

<u>Explanation:</u>

On the off chance, when item A applies a force on item B, at that point item B must apply a force of equivalent size and inverse bearing back on object A. This Newton's third law speaks to a specific balance in nature: forces consistently happen two by two.

And, one body can't apply a force on another without encountering a force itself. Now and again, allude to this law freely as activity response, where the force applied is the activity and the force experienced as a result is the response.  

4 0
3 years ago
Cierta cantidad de hidrogeno esta encerrada en una camara de platino a volumen constante. Cuando la camara se sumerge en un baño
salantis [7]

Answer:

-245.7°C es la temperatura del gas bajo 100 torr

Explanation:

Para resolver esta pregunta debemos hacer uso de la ley de Boyle que establece que la presión de un gas es directamente proporcional a la temperatura de este cuando el volumen permanece constante. La ecuación es:

P1T2 = P2T1

<em>Donde P es presión y T temperatura absoluta del estado inicial, 1, y final, 2.</em>

<em />

Reemplazando:

P1 = 1000torr

T2 = ? -Incógnita-

P2 = 100torr

T1 = 273K -Temperatura del hielo fundido = 0°C = 273K

1000torrT2 = 100torr273

T2 = 27.3K

27.3K - 273 =

<h3>-245.7°C es la temperatura del gas bajo 100 torr</h3>

<em />

3 0
3 years ago
Other questions:
  • Functional groups confer specific chemical properties to the molecules of which they are a part. in this activity, you will iden
    11·1 answer
  • Which reaction below requires the greatest amount of amount of oxygen per mole of explosive for complete oxidation (combustion)
    15·1 answer
  • Air is transparent material?
    14·2 answers
  • Sedimentary rocks formed from the remains of once-living things are
    10·2 answers
  • Magnesium has three naturally occurring isotopes. 24Mg (isotopic mass 23.9850 arnu. abundance 78.99%). 25Mg Osotypic mass 24.985
    10·1 answer
  • ANSWER ASAP
    7·1 answer
  • An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate.The complete ionic equation contai
    5·1 answer
  • Why do atoms always have an overall neutral charge?
    11·2 answers
  • Find the Protons and Electrons for nitrogen -3 ion with 7 neutrons.
    15·2 answers
  • What is the number of moles in each of the following? 6 x 10^22 ions of sodium chloride
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!