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3 years ago

What is this equation? How do you use it in physical science waves

Chemistry

2 answers:

VladimirAG [237]3 years ago

7 0

Answer:

hmm

Explanation:

let me think

NikAS [45]3 years ago

5 0

Answer:

speed of sound, frequency and wavelength

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Using the equations 2 Sr(s) + O₂ (g) → 2 SrO (s) ∆H° = -1184 kJ/mol SrO (s) + CO₂ (g) → SrCO₃ (s) ∆H° = -234 kJ/mol CO₂ (g) → C(

kkurt [141]

Answer: The $\Delta H^o_{rxn}$ for the reaction is 72 kJ.

Explanation:

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.

The given chemical reaction follows:

$2SrCO_3(s)\rightarrow 2Sr(s)+2C(s)+3O_2(g)$ $\Delta H^o_{rxn}=?$

The intermediate balanced chemical reaction are:

(1) $2Sr(s)+O_2(g)\rightarrow 2SrO(s)$ $\Delta H_1=-1184kJ$

(2) $SrO(s)+CO_2(g)\rightarrow SrCO_3(s)$ $\Delta H_2=-234kJ$ ( × 2)

(3) $CO_2(g)\rightarrow C(s)+O_2(g)$ $\Delta H_3=394kJ$ ( × 2)

The expression for enthalpy of the reaction follows:

$\Delta H^o_{rxn}=[1\times (\Delta H_1)]+[2\times (-\Delta H_2)]+[2\times (\Delta H_3)]$

Putting values in above equation, we get:

$\Delta H^o_{rxn}=[(1\times (-1184))+(2\times -(-234))+(2\times (394))]=72kJ$

Hence, the $\Delta H^o_{rxn}$ for the reaction is 72 kJ.

4 0

3 years ago

"I think of a number, multiply it by itself and then add 6 to the result +

Sonja [21]

Answer:

ok 3 = 9 15 i got 15 so what

Explanation:

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3 years ago

Does CH3F have a higher boiling point than BRF?

Anna71 [15]

Answer:

The boiling point of the fluoromethane (CH3F) is higher than that of fluorine (F2).

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2 years ago

Stephanie purchased two watermelons. One watermelon weighed 6.95 kilograms. The second watermelon

leonid [27]

Answer:

7.47 kilograms

Explanation:

8 0

3 years ago

Read 2 more answers

Which of the following represents the greatest number of atoms?

forsale [732]

The correct option is B. To get the number of atom for each compound, each element in the compound will be counted as an atom. For instance, for Fe[ClO4]2, there are 1 atom of Fe, 2 atoms of Cl, and 8 atoms of O, making a total of 11 atoms [1 + 2 + 8= 11]. The other options have less than 11 atoms.

7 0

3 years ago

What is this equation? How do you use it in physical science waves​

What is this equation? How do you use it in physical science waves