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
Lena [83]
2 years ago
13

1. A positive value for AH for a chemical reaction is an indication of which of the following?

Chemistry
1 answer:
goldenfox [79]2 years ago
5 0
C is the correct answer
You might be interested in
Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin
anyanavicka [17]

Answer:

The difference is 293.15 Kelvin.

Explanation:

Given data:

Temperature difference of matter = 20°C

Temperature difference of matter in kelvin = ?

Solution;

Formula:

0°C +273.15

now we will put the values instead of 0.

20°C + 273.15 = 293.15 K

Thus, the temperature difference between two sample is 293.15 K.

5 0
3 years ago
What are the representative elements? Where are they located
WINSTONCH [101]
The representative elements are elements where the s and p orbitals are filling. The transition elements are elements where the d orbitals (groups 3–11 on the periodic table) are filling, and the inner transition metals are the elements where the f orbitals are filling.
4 0
3 years ago
The activation energy for the reaction NO2(g)+CO(g)⟶NO(g)+CO2(g) is Ea = 75 kJ/mol and the change in enthalpy for the reaction i
lapo4ka [179]

Answer:

= 100kJ

Explanation:

The reverse reaction's activation energy of a reaction is the activation energy of the forward reaction plus ΔH of the reaction:

Ea of forward reaction =75kJ

∆H = -175 kJ/mol

Ea of reverse reaction = 75 +(-175)

= 100kJ

Note that a reverse reaction is one which can proceed in both direction depending on the conditions.

6 0
3 years ago
The burning characteristics of a gasoline can be improved by converting the octane it contains into isooctane. This conversion r
bogdanovich [222]

Gasoline is refined petroleum used in engines as a fuel. It contains octane that can be converted to isooctane by adding catalysts like platinum and palladium.

<h3>What are catalysts?</h3>

Catalysts are substances that raise the reaction rate by decreasing the activation energy but do not get consumed themselves in a reaction.

Platinum and palladium metals can be used as a catalyst to convert the octane of the gasoline into isooctane as they are oxidation catalyst that converts the fuel components into water and carbon dioxide.

Therefore, platinum and palladium are used as catalysts in converting octane.

Learn more about catalysts here:

brainly.com/question/1392595

#SPJ4

7 0
10 months ago
B) At what pH is H2 at 10 atm at equilibrium with this solution and pure nickel?
scZoUnD [109]
19372)19292
Hahaha ss
Qowieuww
6 0
3 years ago
Other questions:
  • Which state of matter isn't typically found on earth?
    12·1 answer
  • Hi can you slove this please. ..​
    15·1 answer
  • A pot filled with snow is left on a hot stove for a while. What would happen?
    10·1 answer
  • When heat is added, particles in a solid, liquid, or gas do what
    13·1 answer
  • A 1% solution of Ivermectin contains how many mcg per mL?
    9·2 answers
  • Convert 200 grams of silver (Ag) to mols of silver (Ag)
    14·1 answer
  • Convert 2.41 x 10^2 m to cm
    11·1 answer
  • 6. Mia and her best friend Claudia are comparing eye colors. Mia has blue eyes, and Claudia has brown eyes. What is a difference
    6·2 answers
  • What is the least measurement of black hole, ​
    11·1 answer
  • Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have?.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!