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Nuetrik [128]
2 years ago
8

Write all the laws of thermodynamics.​

Chemistry
2 answers:
Rashid [163]2 years ago
7 0
The laws of thermodynamics are: First law of thermodynamics: Energy can neither be created nor be destroyed, it can only be transferred from one form to another. Second law of thermodynamics: The entropy of any isolated system always increases.
Enthalpy In Thermodynamics: Thermal Energy Definition
What Is Planck's Constant: Entropy Definition Thermodynamics
Zeroth Law Of Thermodynamics Examples: Applications Of Newton's Laws Of Motion
Neko [114]2 years ago
3 0

1. energy cannot be created or destroyed

2. for a spontaneous process, the entropy the universe increases

3. a perfect Crystal a zero Kelvin has zero entropy

4. the dissipative component of evolution is in a direction of steepest entropy ascent.

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One hundredth of a meter is called a
Lena [83]
That is called one centimeter
5 0
3 years ago
In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)2(aq) 2 NaBr(aq) PbBr2(s) 2 NaNO3(aq)
lyudmila [28]

Answer : The mass of NaBr is, 295.323 grams

Solution :

First we have to calculate the moles of NaNO_3.

\text{Moles of }NaNO_3=\frac{\text{Mass of }NaNO_3}{\text{Molar mass of }NaNO_3}=\frac{244g}{85g/mole}=2.87moles

Now we have to calculate the moles of NaBr.

The balanced chemical reaction is,

Pb(NO_3)_2(aq)+2NaBr(aq)\rightarrow PbBr_2(s)+2NaNO_3(aq)

From the balanced reaction we conclude that

As, 2 moles of NaNO_3 react with 2 moles of NaBr

So, 2.87 moles of NaNO_3 react with 2.87 moles of NaBr

Now we have to calculate the mass of NaBr.

\text{Mass of }NaBr=\text{Moles of }NaBr\times \text{Molar mass of }NaBr

\text{Mass of }NaBr=(2.87mole)\times (102.9g/mole)=295.323g

Therefore, the mass mass of NaBr is, 295.323 grams

7 0
3 years ago
Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes?
Ksenya-84 [330]

"c. Number the chain of carbons, starting with the end nearest the multiple bond."

This choice means that the carbon atoms determine the name of the hydrocarbonsThank you for your question. Please don't hesitate to ask in Brainly your queries. 
3 0
3 years ago
Read 2 more answers
22. Which one of the following processes has a negative value for AH°?
ss7ja [257]

Answer:

C

Explanation:

A negative deltaH means that the reaction has to give up heat in order to happen. You have to treat deltaH as a reactant. So the question is do you need to add heat to the reactants to make the products. If you do, deltaH is plus.

Heat is required to make a solid go to a gas. deltaH is plus. A is not the answer.

A lot of heat is required for B (something like 400 Kj / mole. Like A, deltaH is plus and B is not the answer.

C: The liquid has to give up heat in order for the this reaction to take place. C is the answer.

D requires heat. It is not the answer.

4 0
3 years ago
Isotope b has a half-life of 3 days. a scientist measures out 100 grams of this substance. after 6 days has passed, the scientis
Brilliant_brown [7]
So half life is the time taken for a sample to decay to half its original mass, its a constant and applies to any original mass, it could be 5g or 1kg, it will take the same amount of time for the original mass to half. In this case the half life is 3 days.

After 3 days the sample will be at half its original mass, now 50g. 

Now we can treat the 50g as if its a new sample. After another 3 days (6 days in total) there will be half of 50g left, = 25g. 


6 0
3 years ago
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