<u>Answer:</u> The for the reaction is -810 kJ.
<u>Explanation:</u>
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:
The intermediate balanced chemical reaction are:
(1)
(2)
The expression for enthalpy of the reaction follows:
Putting values in above equation, we get:
Hence, the for the reaction is -810 kJ.
Answer:
Molecular weight is how much each molecule weights, while molecular mass is how many molecules there are in a certain element
Answer: weener proposed that a meteor hit earth that caused plate tectonics to shift
The spectrum goes as follows:
red, orange, yellow, green, blue, indigo and violet
Red has the lowest frequency.
Since frequency is inversely proportional to the wavelength, therefore, red has the longest wavelength.
Now, consider, the equation:
E = (hc) / lambda
Since the energy is inversely proportional to the wavelength, therefore, red will have the lowest energy.
Based on this, for the mentioned question:
1- Red has longer wavelength
2- Green has greater frequency
3- Green has greater energy