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
masha68 [24]
1 year ago
10

The AE of a system that releases 12.4 J of heat and does 4.2 J of work on its surroundings It is_______ jA. 16.6 B. 12.4 C. 4.2

D. -16.6
Chemistry
1 answer:
andre [41]1 year ago
3 0

ANSWER

EXPLANATION

Given that

The energy released by the system is 12.4J

Work done on the surrounding is 4.2J

Follow the steps below to find the change in energy

In the given data, energy is said to be released to the surroundings

Recall, that exothermic reaction is a type of reaction in which heat is released to the surroundings. Hence, change in enthalpy is negative

Step 1; Write the formula for calculating change in energy

\Delta E\text{ }=\text{ q }+\text{ w}

Since heat is released to the surrounding, then q = -12J

Recall, that work done by the system on the surroundings is always negative

Hence, w = -4.2J

Step 2; Substitute the given data into the formula in step 1

\begin{gathered} \text{  }\Delta E\text{ = q + w} \\ \text{  }\Delta E\text{ }=\text{ -12.4 }+\text{ \lparen-4.2\rparen} \\ \text{  }\Delta E\text{ = -12.4 - 4.2} \\ \text{  }\Delta E\text{ }=\text{ -16.6J} \end{gathered}

Therefore, the change i

You might be interested in
Dogs can be acutely poisoned if they eat very small amounts of , a sweetener commonly found in sugar-free gum.
Advocard [28]

Answer:

Xylitol

Please give me the brainliest if you found this helpful

3 0
3 years ago
What is saturated solution and how it is prepared
Dimas [21]
Hope my answer helped you
5 0
3 years ago
How does an increase in temperature affect the equilibrium concentration of the underlined substance and K for each of the follo
Darya [45]

Explanation:

Due to the positive value of the change in temperature, this is an endothermic reaction.

Since the forward reaction is endothermic, increasing the temperature increases the equilibrium constant (k).

In an equilibrium system, the position of the equilibrium will move in a way to annul the change made to the system. An increase in temperature for an endothermic reaction would favour the reaction, leading to increase in amount of products and decrease in amount of reactants.

3 0
3 years ago
Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes?
Ksenya-84 [330]

"c. Number the chain of carbons, starting with the end nearest the multiple bond."

This choice means that the carbon atoms determine the name of the hydrocarbonsThank you for your question. Please don't hesitate to ask in Brainly your queries. 
3 0
3 years ago
Read 2 more answers
An ax is used to chop wood. The metal part chops through the wood, pushing it apart into two smaller sections. which simple mach
Sati [7]
The <span>simple machine found on the head of the  ax is </span>Wedge. A wedge is an inclined plane that can be moved. When an ax is used to split wood, the ax handle exerts a force on the blade of the axe, which is the wedge. That force pushes the wedge down into the wood. The wedge in turn exerts an output force splitting the wood in two. 
3 0
3 years ago
Other questions:
  • A solution
    7·1 answer
  • Need help please!!!!!!!
    6·2 answers
  • Which of the correctly provides the name of the element
    10·1 answer
  • What is the relationship between the atomic numbers and ionic radii of the elements in the group 7a
    5·1 answer
  • What pressure will be exerted by 0.650 mol of a gas at 30.0C if it is contained in a 0.700 L vessel?
    13·1 answer
  • What types of reactions is shown below? check all that apply 2H2O2–&gt;2H2O+O2
    10·2 answers
  • A compound contains 29.27% carbon, 51.22% nitrogen, and 19.50% oxygen. What is the molecular formula if the molar mass is 570.5
    11·1 answer
  • I need help with the stuff highlighted in the blue
    13·2 answers
  • 2 Cu + Cl2 ----&gt; 2 Cuci
    10·1 answer
  • I Need Help on these science questions
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!