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
Romashka-Z-Leto [24]
3 years ago
8

Which choice contains a FALSE statment? A. For the vaporization of liquid benzene ΔH is positive. B. For the formation of 1 mol

nitrogen dioxide from its elements (heat is absorbed)ΔH is negative. C. For the sublimation of dry ice [conversion of CO₂(s) directly to CO₂(g)] ΔH is positive. D. For the reaction of 1 mol of sulfur dioxide with oxygen ΔH is negative. E. None of these is/are FALSE
Chemistry
1 answer:
ser-zykov [4K]3 years ago
7 0

Answer:

B is False

Explanation:

In physical chemistry we always look from system's perspective, so if we heat something ΔH is positive and if the system gives heat out then ΔH is negative.

A. We have to give energy to benzene to evaporate it. Statement true.

B. If heat is absorbed then the enthalpy must be positive.

C. The heat is absorbed then ΔH is positive.

D. Usually for burning heat is exposed from system. So enthalpy is negative.

E. Obvious

You might be interested in
Sally has constructed a concentration cell to measure Ksp for MCln. She constructs the cell by adding 2 mL of 0.05 M M(NO3)n to
hram777 [196]

Answer:

0.1056 mole

Explanation:

As Sally knows that the charge on the metal ion is n = +2

$MCl_n=MCl_2$

In that compartment $[M^{n+}]=[m^{2+}]=8.279 \ M$

The volume of the $MCl_n$ taken in that compartment = 6.380 mL

So, the number of moles of $M^{2+} = 8.279 \times 6.380$

                                                      = 52.82 m mol

                                                      = 0.05280 mol

$MCl_n \rightarrow M^{n+}+nCl^-$

But n = 2

Therefore, moles of $Cl^-$ = 2 x moles of $M^{n+}$

                                       = 2 x 0.05282

                                       = 0.1056 mole

3 0
3 years ago
when Mn2 ions are separated from the mixture, they go through a series of oxidizing and reducing steps. Write the reaction equat
goldfiish [28.3K]

Answer: hello some part of your question is missing below is the missing part

when H₂O and H₂O₂ is added to Mn(OH)₂(s) and put in water bath to dissolve

answer : attached below

Explanation:

When Mn²⁺ ions are separated from the mixture, attached below are the requires reaction equations that shows the process of separation.

Mn²⁺ ions are separated to the right of the reaction  equations

8 0
3 years ago
In terms of bonds what would the molecule C6H12 be classified as
docker41 [41]

It has a double C=C bond so that means it's unsaturated, but it can also be a cyclic compound with only simple C-C bonds

5 0
3 years ago
Does anyone know how to do this?
mr Goodwill [35]

Answer:

this look hard

Explanation:

hmm

4 0
3 years ago
At equilibrium, ________. At equilibrium, ________. all chemical reactions have ceased the rate constants of the forward and rev
balandron [24]

Answer:

<em>At equilibrium, the rate of the forward, and the reverse reactions are equal.</em>

Explanation:

In an equilibrium chemical reaction, the rate of forward reaction, is equal to the rate of reverse reaction. Note that the reactions does not cease at equilibrium, but rather, the reactants are converted to product, at the same rate at which the product is also being converted into the reactants in the reaction. When chemical equilibrium is reached, a careful calculation of the value of equilibrium constant is approximately equal to 1.

NB: If the value of equilibrium constant is far far greater than 1, then the reaction will favors more of the forward reaction, and if far far less than 1, the reaction will favor more of the reverse reaction.

6 0
3 years ago
Other questions:
  • identify the specific species responsible for the acidic properties of a solution of hydrochloric acid
    14·2 answers
  • Suppose you have a liquid solution containing two components, acetone and nonane. The boiling point of pure acetone is 56 C and
    13·1 answer
  • Suggest a reason why the equilibrium between succinic acid and acetic anhydride lies on the side favoring formation of acetic ac
    14·1 answer
  • One mole of Ca is equal to how many atoms​
    15·1 answer
  • Draw all the structural isomers for the molecular formula C3H8O. Be careful not to draw any structures by crossing one line over
    6·1 answer
  • Consider molecular, complete ionic, and net ionic equations.
    8·1 answer
  • Which sphere forms Earth's outermost layer?
    13·1 answer
  • Which of the following safety devices ensures that electricity will flow through it when flowing "downhill" instead of through p
    9·2 answers
  • To completely neutralise 200cm3 of 0.5mol/dm3 sodium hydroxide (NaOH), a student adds 100cm3 of 0.5mol/dm3 sulfuric acid (H2SO4)
    7·1 answer
  • Napisz wzory sumaryczne tlenków o podanych nazwach
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!