All categories

1 year ago

Classify each of the following reactions as either exothermic or endothermic: 2H,O(l) + heat → 2H₂(g) + O₂(g)

Chemistry

1 answer:

Murljashka [212]1 year ago

6 0

Answer:

endothermic

Explanation:

It is endothermic since it absorbs heat. If the reaction RELEASED heat (exothermic) the "+ heat" would be on the right side of the equation.

You might be interested in

CAN SOMEONE PLEASE HELP ME!!!! I CAN'T GET ANY HELP IN THE SCIENCE SECTION!!!!!

lorasvet [3.4K]

Answer: shining a bright light on the object and testing for decomposition

Decomposition is the separation of a molecule into its elements or simpler compounds.

And a chemical property is the ability of a substance to combine or to become one or more substances.

Then, testing the ability of an object for decomposition is testing a chemical property.

6 0

3 years ago

Read 2 more answers

With radiocarbon dating, scientists compare an object's carbon-14 levels with _____. the carbon-14 levels of an object from the

trapecia [35]

Answer:carbon-14 levels in the atmosphere

Explanation:

When carrying out radiocarbon dating, the level of carbon-14 in a sample is compared with the level of carbon 14 in the atmosphere because, objects exchange carbon-14 with the atmosphere.

Comparison of the activities of carbon-14 in the atmosphere and in the sample gives the age of the sample since the half-life of carbon-14 is a constant.

5 0

3 years ago

What does Hess's law state about the total enthalpy change for a reaction?OA. It depends on the reaction pathway.B. It can only

Dimas [21]

<h2>Answer:</h2>

Option D is correct. It is independent of the reaction pathway.

<h2>Explanations:</h2><h2>What is Hess's law?</h2>

Hesslaw states that the enthalpy change of a reaction does not change regardless whether the reaction takes place in a single or multiple reaction pathways.

This shows that the total entalpy change of a reaction does not depend on the reaction pathway.

8 0

1 year ago

Which Of These Is An Indication That A Chemical Reaction Has Occurred?

nikdorinn [45]

<u><em>Answer:</em></u>

Correct option is D. Formation Of A Gas

<u><em>Explanation</em></u>

The main indication of chemical is that new substances are formed which have different composition than reactant.

<u><em>Freezing of a substance: </em></u>As in this case composition remained same, so we cant say, chemical reaction is take place, like when water freezes, it composition is same as water , so it is only its physical properties, not chemical.

<u><em>Melting of a substance:</em></u> As in this case composition remained same, so we cant say, chemical reaction is take place, like when ice melts, composition of water remained same , so it its physical properties, not chemical.

<u><em>Boiling of a substance:</em></u> As in this case composition remained same, so we cant say, chemical reaction is take place, like when water boils and become vapors, composition of water and vapors remained same , so it its physical properties, not chemical properties which show its chemical reaction.

<u><em>Formation of gas:</em></u>

In this case, chemical reaction take place. In chemical reactions, new substance are formed whose composition is different from reactants.

6 0

3 years ago

Read 2 more answers

Describe what happens between days 15-28 if the egg does not gets fertilized

dolphi86 [110]

If the egg is fertilized by a man's sperm, the resulting embryo would travel down the fallopian tube and implant in the uterus. This happens around the 20th day of the menstrual cycle. ... Around day 26 of your cycle, the uterus will begin the process to shed its lining causing menstruation to begin

hope this helps

4 0

3 years ago

Classify each of the following reactions as either exothermic or endothermic: 2H,O(l) + heat → 2H₂(g) + O₂(g)​

Classify each of the following reactions as either exothermic or endothermic: 2H,O(l) + heat → 2H₂(g) + O₂(g)