To calculate the air pressure, the volume occupied by the air is assumed constant. why is this assumption incorrect?
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Ответ:
Explanation:
According to ideal gas equation as:
PV=nRT
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant
Pressure is inversely proportional to the volume of the gas. Hence, This assumption is incorrect because the amount being added to flask affect both the pressure and the volume occupied by the air.
Ответ:
A catalyst speeds up a reaction by lowering the activation energy.
Explanation:
A catalyst has no effect on the equilibrium of a reaction.A catalyst does not add energy to a reaction neither does a catalyst consumed in a chemical reaction .
Therefore, A catalyst speeds up a reaction by lowering the activation energy.