Give two other examples each acidic and basic oxids that are not mentioned
2 answers:
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Answer:
The amount of heat released is -5,232.5 J
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
The amount of heat received or transferred by a body when it undergoes a temperature variation (Δt) without there being a change of physical state (solid, liquid or gaseous) is calculated by the expression:
Q = c * m * ΔT
Where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case:
- Q=?
- c=4.186
- m= 250 g
- Δ=Tfinal - Tinitial= 25°C - 30°C= -5 °C
Replacing:
Q= 4.186 *250 g* (-5°C)
Solvng:
Q= -5,232.5 J
The amount of heat released is -5,232.5 J
<u>Answer:</u> The mass of HF reacted is 150 g.
<u>Explanation:</u>
We are given:
Amount of energy released = -345 kJ
For the given chemical reaction:
By Stoichiometry of the reaction:
184 kJ of energy is released when 4 moles of hydrofluoric gas is reacted.
So, 345 kJ kJ of energy will be released when = of hydrofluoric gas is reacted.
Now, to calculate the mass of HF, we use the equation:
Molar mass of HF = 20 g/mol
Moles of HF = 7.5 moles
Putting values in above equation, we get:
Hence, the mass of HF reacted is 150 g.