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3 years ago

When calculating specific heat, what does the variable 'Q' represent?

Chemistry

2 answers:

dlinn [17]3 years ago

7 0

Answer:

Thermal Energy

Explanation:

Educere Founders Education Answer

LekaFEV [45]3 years ago

4 0

Answer:

Heat Energy

Explanation:

Specific heat is the a thermodynamic property of the substances. When we have to raise the temperature of unit mass of a given substance by one degree, the heat we will require for this purpose is known as Specific Heat.

Specific heat is calculated using the following formula which relates the specific heat with Heat Energy and Temperature

$Q=mc$ Δ $T$

Where,

$Q$ = Heat energy,

$m$ = mass of the substance in Kg.,

$c$ = Specific heat, and

Δ $T$ = change in temperature in kelvins.

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Feliz [49]

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3 years ago

Read 2 more answers

How many pounds of manganese are in 1.261 tons of Mn2O3?

Alina [70]

Answer:

2000pound

Explanation:

Manganese metal is produced from the manganese(III) oxide, Mn2O3, which is found in manganite, a manganese ore. The manganese is reduced from its +3 oxidation state in Mn2O3 to the zero oxidation state of the uncharged metal by reacting the Mn2O3 with a reducing agent such as aluminum or carbon. How many pounds of manganese are in 1.261 tons of Mn2O3? (1 ton = 2000 pounds)

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2 years ago

The Moon shines white light on Earth. Is the Moon a good blackbody

Hitman42 [59]

Answer:

C.) No, because the Moon reflects most of the Sun's light rather than

absorbing it

Explanation:

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3 years ago

PLEASEEE HELP ASAPPPPP

inna [77]

Answer: answer A

Explanation: because it gives more detail and a summarizations

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3 years ago

What volume of 0.152 M KMnO4 solution would completely react with 20.0 mL of 0.381 M FeSO4 solution according to the following n

ANEK [815]

Answer: The volume of permanganate ion (potassium permanganate) is 10.0 mL

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$ .....(1)

Molarity of ferrous sulfate solution = 0.381 M

Volume of solution = 20.0 mL = 0.020 L (Conversion factor: 1 L = 1000 mL)

Putting values in equation 1, we get:

$0.381M=\frac{\text{Moles of ferrous sulfate}}{0.020L}\\\\\text{Moles of ferrous sulfate}=(0.381mol/L\times 0.020L)=0.00762mol$

For the given chemical equation:

$5Fe^{2+}+8H^++MnO_4^-\rightarrow 5Fe^{3+}+Mn^{2+}+4H_2O$

By Stoichiometry of the reaction:

5 moles of iron (II) ions (ferrous sulfate) reacts with 1 mole of permanganate ion (potassium permanganate)

So, 0.00762 moles of iron (II) ions (ferrous sulfate) will react with = $\frac{1}{5}\times 0.00762=0.00152mol$ of permanganate ion (potassium permanganate)

Now, calculating the volume of permanganate ion (potassium permanganate) by using equation 1, we get:

Molarity of permanganate ion (potassium permanganate) = 0.152 M

Moles of permanganate ion (potassium permanganate) = 0.00152 mol

Putting values in equation 1, we get:

$0.152mol/L=\frac{0.00152mol}{\text{Volume of permanganate ion (potassium permanganate)}}\\\\\text{Volume of permanganate ion (potassium permanganate)}=\frac{0.00152mol}{0.152mol/L}=0.01L=10.0mL$

Hence, the volume of permanganate ion (potassium permanganate) is 10.0 mL

3 0

3 years ago