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
arsen [322]
3 years ago
8

Given the standard enthalpy changes for the following two reactions:

Chemistry
2 answers:
koban [17]3 years ago
8 0

Answer:

ΔH° = -186.2 kJ

Explanation:

Step 1: Data given

(1) Sn(s) + Cl2(g) ⇆ SnCl2(s)    ΔH° = -325.1 kJ

(2) Sn(s) + 2Cl2(g) ⇆ SnCl4(l)    ΔH° = -511.3 kJ

Step 2: The balanced equation

SnCl2(s) + Cl2(g) ⇆ SnCl4(l)

Step 3: Calculate the standard enthalpy change for the reaction

We have to take the reverse equation of the first reaction ( Because we need SnCl2 as reactant)

SnCl2(s) ⇆ Sn(s) + Cl2(g) ΔH° = 325.1 kJ

Then we add the second equation to this new one

SnCl2(s) ⇆ Sn(s) + Cl2(g) ΔH° = 325.1 kJ

Sn(s) + 2Cl2(g) ⇆ SnCl4(l)    ΔH° = -511.3 kJ

SnCl2(s) + Sn(s) + 2Cl2(g)  ⇆ Sn(s) + Cl2(g) + SnCl4(l)  

SnCl2(s) + Cl2(g) ⇆ SnCl4(l)

ΔH° = 325.1 kJ + (-511.3kJ)

ΔH° = 325.1 kJ - 511.3 kJ

ΔH° = -186.2 kJ

lawyer [7]3 years ago
7 0

Answer:

ΔH° = -186.2 kJ

Explanation:

Hello,

This case in which the Hess method is applied to compute the required chemical reaction. Thus, we should arrange the given first two reactions as:

(1) it is changed as:

SnCl2(s) --> Sn(s) + Cl2(g)...... ΔH° = 325.1 kJ

That is why the enthalpy of reaction sign is inverted.

(2) remains the same:

Sn(s) + 2Cl2(g) --> SnCl4(l)......ΔH° = -511.3 kJ

Therefore, by adding them, we obtain the requested chemical reaction:

(3) SnCl2(s) + Cl2(g) --> SnCl4(l)

For which the enthalpy change is:

ΔH° = 325.1 kJ - 511.3 kJ

ΔH° = -186.2 kJ

Best regards.

You might be interested in
HELP! WILL MARK BRAINLIEST! ASAP!!
lilavasa [31]

Answer:

Mn is a Paramagnetic

Explanation:

8 0
3 years ago
Describe the formation of ions by electron loss or gain
Ronch [10]

Explanation:

Ions form when atoms gain or lose electrons. This is so that they form a full outer shell of electrons. When an atom gains electrons it becomes a negative ion, because electrons are negatively charged. For example, all halogens (group 7 or 17) form negative ions as they gain an electron forming a 1- charge. When an atom loses electrons it becomes a positive ion, as it is losing some negative charge from the electrons. This would be for example, alkali metals (group 1) which lose an electron to form a positive ion with a 1+ charge, (ALL metals form positive ions).

6 0
2 years ago
What is the molarity of a solution prepared by diluting 43.72 ml of 1.005 M aqueous K2CR2O7 to 500 ml
UNO [17]

Answer:

43.72

Explanation:

that is the answer hope u liked it and I did this already along time ago

3 0
3 years ago
Why do atoms move at different speeds depending on whether they are in liquids or solids.
bekas [8.4K]
<span>In a solid the atoms are tightly packed together and vibrate in place, in a liquid the atoms are loosely packed together and can move past each other,
 
extra: and in a gas the atoms are far apart and move freely and </span><em>
</em><em>
</em>
6 0
3 years ago
A substance has a volume of 50L and a density of 10.36g/l. What is the mass of the substance?
Lelechka [254]

Answer:

518 g

Explanation:

50L x 10.36 g/L = 518g

3 0
3 years ago
Read 2 more answers
Other questions:
  • Please can someone help I will mark brainiest!
    13·1 answer
  • Draw the kinetic and thermodynamic enolates formed when 3-methylbutan-2-one (methyl isopropyl ketone) is treated with base. Incl
    8·1 answer
  • The number of moles in 250 L of He gas at STP is ________ mol, Round to a whole number,
    15·1 answer
  • Why is a solution not a pure substance
    9·1 answer
  • Which of these is NOT a function of the digestive system?
    13·1 answer
  • what would you be most likely to measure by immsering and object in water and seeing how much the water level rises
    11·1 answer
  • Please help me out asap
    6·2 answers
  • When an aqueous solution of strontium chloride is added to an aqueous solution of potassium sulfate, a precipitation reaction oc
    9·1 answer
  • 7.7 cm<br> 9.8 cm<br> 0.00<br> 0.162 m
    10·1 answer
  • Help ty! I just need help with the third one
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!