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
Arturiano [62]
3 years ago
15

77.In the early days of automobiles, illumination at night was provided by burning acetylene, C2H2. Though no longer used as aut

o headlamps, acetylene is still used as a source of light by some cave explorers. The acetylene is(was) prepared in the lamp by the reaction of water with calcium carbide, CaC2:CaC2(s)+2H2O(l)⟶Ca(OH)2(s)+C2H2(g). Calculate the standard enthalpy of the reaction. TheΔHf°of CaC2is −15.14 kcal/mol.
Chemistry
2 answers:
natta225 [31]3 years ago
3 0

Answer:

554.86kj

Explanation: Since 1 mole of CaC2=15.14kj yield 1mole of C2H2

The enthalpy change of H2O is 2*285=570

570+-15.14=554.86kj

Hence Hp is 554.86kj

He=Hp

julsineya [31]3 years ago
3 0

Answer:

the standard enthalpy for the reaction is

ΔHreaction° = -122.79kJ

Explanation:

Given the enthalpy of formation of Δf° of CaC₂ = -15.14 kcal/mol

step1: convert 15.14kcal/mol to kJ/mol

       1 kcal = 4.184 kJ

hence, -15.14 kcal * 4.184 kJ = -63.35 kJ/mol

Step 2: calculate the standard enthalpy of calcium carbide with water using equation from Hess's law;

       ΔH°reaction = Σₙ * ΔH°product - Σₙ * ΔH°reactant

 ΔH°reaction = [ 1 mol. Ca(OH)₂ * -985.2 kJ/mol. Ca(OH)₂ + 1 mol. C₂H₂ * 227 kJ/mol. C₂H₂] - [1 mol. CaC₂ * -63.36kJ/mol. CaC₂ + 2 mol. H₂O * -285kJ/mol. H₂O]

ΔH°reaction = 1 (-985 kJ) + 1 (227.4 kJ) - 1 (-63.65 kJ) - 2 (-285.83)

                      = -985.2 kJ + 227.4 kJ + 63.35 kJ + 571.66 kJ

ΔH°reaction = -122.79 kJ

You might be interested in
Help, I need this quick. Someone please.
timofeeve [1]

Answer:

the answer to that question is d

7 0
3 years ago
Side Show
den301095 [7]

Answer: if you have this app then you’r not smart

Explanation: because cheating is not allowed

4 0
3 years ago
Is this an oxidation reaction? Why or why not?
murzikaleks [220]
The oxidation state of Hydrogen in reactant side is 0 and that in product side is +1. Hence the reaction is oxidation.
7 0
3 years ago
Different between a bird and a rat​
Bess [88]

Explanation:

Rats and mice are both rodents, so look similar - the biggest difference is their size. Rats are larger and heavier while mice have smaller slender bodies. Mice also have long slender tails (for their body size) covered in hair compared to rat tails which are shorter, thicker and hairless

5 0
2 years ago
How many moles of NH3 can be produced by the reaction of 2.00 g of N2 with 3.00 g H2?
yulyashka [42]
0.235 if I’m not mistaken!
8 0
2 years ago
Other questions:
  • How many atoms of fluoride are there in one molecule of nitrogen trifluoride?
    8·2 answers
  • What happens when you heat an air filled sealed can ?
    9·1 answer
  • Is this equation balanced and in the lowest form? 4NH3 → 2N2 + 6H2 Yes, because there are equal amounts of atoms of each element
    13·2 answers
  • What mass of NaOH is in 3.0e+02 mL of a 5.0 M NaOH solution?
    10·1 answer
  • 9. Based on your work with benzoic acid, show the reaction between salicylic acid and potassium hydroxide. Label the acid, base,
    10·1 answer
  • Help please!
    11·1 answer
  • PLZ HELP THERE IS A FILE ATTACHED WILL GIVE U BRAINLIEST IF U HELP
    8·2 answers
  • Identify the right
    13·1 answer
  • What are the characteristics of solution,colloids,and susensions?
    10·2 answers
  • 1. What is the apparatus used to measure production in plants ?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!