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
Sophie [7]
3 years ago
14

How many joules of energy would it take to raise the temperature of 2.5 grams of magnesium metal from

Chemistry
1 answer:
garik1379 [7]3 years ago
4 0

Answer:

Q = 63.75J

Explanation:

Mass = 2.5g

Initial temperature (T1) = 25°C

Final temperature (T2) = 50°C

Specific heat capacity of Mg = 1.020J/g°C

Heat energy = ?

Heat Energy (Q) = mc∇T

Q = heat energy

M = mass of substance

C = specific heat capacity of substance

∇T = change in temperature = T2 - T1

Q = mc∇T

Q = mc(T2 - T1)

Q = 2.5 × 1.020 × (50 - 25)

Q = 2.55 × 25

Q = 63.75J

The heat energy required to raise magnesium metal from 25°C to 50°C is 63.75J

You might be interested in
For the reaction below, determine the standard free energy change, δg o. cu(s) + sn2+(aq) → cu2+(aq) + sn(s) e o cell =–0.48 v v
Salsk061 [2.6K]

Answer:

92.6 kJ.

Explanation:

<em>∵ ΔG°rxn = - nFE°cell,</em>

Where, ΔG°rxn is the standard free energy change (J).

n is the no. of electrons in the reaction (n =2).

F is Faraday constant (C/mol) (F = 96500 C/mol).

E°cell is the standard cell potential (E°cell = - 0.48 V).

<em>∴ ΔG°rxn = - nFE°cell </em>= - (2)(96500 C/mol)(- 0.48 V) = <em>92640 J = 92.64 kJ.</em>

7 0
3 years ago
Una sola dosis de etanol, C2 H5 OH, eleva el nivel intracelular de iones calcio. Los iones Ca2+ liberados por el etanol 0,10 M m
11Alexandr11 [23.1K]

Answer:

No se bro cual se la respuesta .......

Explanation:

lo siento(

4 0
3 years ago
Science can best be described as
Savatey [412]
A way of building knowledge about the world around us through observation and experimentation.
8 0
3 years ago
Draw a Lewis structure for [H3O]+. Show all unshared pairs and the formal charges, if any.
Montano1993 [528]

Answer: Formal Charges: Hydrogen = 0 and Oxygen = +1

Unshared Pair of electrons: Hydrogen = 0 and Oxygen = 2

Explanation:

The attachment below shows the Lewis structure and the calculations

3 0
3 years ago
The molar mass of argon is 40g / mol what is the molar mass of a gas if it effuses at 0.91 times the speed of argon gas
Effectus [21]
To determine the molar mass of the unknown gas, we use Graham's Law of Effusion where it relates the effusion rates of two gases with their molar masses. It is expressed as r1/r2 = √M2/M1. We calculate as follows:

Let 1 = argon gas
      2 = unknown gas

r2 = 0.91r1
r1/r2 = 1/0.91

1/0.91 = √M2/M1 = √M2/40
M2 = 48.30 g/mol
8 0
4 years ago
Other questions:
  • When placed in a 100 mL cube-shaped box, a substance fills the cube and has a volume of 100 mL. When placed in a 50 mL tube, tha
    10·1 answer
  • What happens to the molecules of water when water changes from a liquid to a vapor?
    11·1 answer
  • Hurricanes cause large waves that hit the coast with considerable force. How can these waves negatively impact an ecosystem near
    12·2 answers
  • An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valance electron than beryll
    9·1 answer
  • What would a substance that could undergo condensation polymerization most likely have?
    11·2 answers
  • Can alkenes react with potassium dichromate
    7·1 answer
  • Which of the following elements has the largest electronegativity? A) Bismuth B) Nitrogen C) Potassium D) Arsenic​
    10·1 answer
  • Which of the following are strong electrolytes in water?
    12·2 answers
  • The average temperature at the South Pole In January is - 35.4 °C.
    14·1 answer
  • A student used a balance to measure 34.82 g of a chemical. Which digit of the measurement has the greatest uncertainty?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!