What is the poH of a 0.0235 M HCl solution?
1 answer:
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Answer:
Explanation:
Given data:
Number of frame is 12+ 8 = 20
Total filtrate is 360 lb
we know
For 1 plate area
Then for 20 are PLATE
filtrate equation is given as
In the above equation only t and A is variable , all other terms are constant
Therefore we have
Taking into account the definition of calorimetry ans sensible heat, you need a heat of 38.72 kJ to raise the temperature of 400 g of ethanol from 20 °C to 60 °C.
<h3>What is calorimetry and sensible heat</h3>Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where
- Q is the heat exchanged by a body of mass m.
- c is the specific heat substance c.
- ΔT is the temperature variation.
In this case, you know:
- Q= ?
- c= 2.42
- m= 400 g
- ΔT= Tfinal - Tinitial= 60 °C - 20 °C= 40 °C
Replacing in the definition of sensible hear:
Q = 2.42 × 400 g× 40 °C
Solving:
<u><em>Q= 38,720 J= 38.72 kJ</em></u>
Finally, you need a heat of 38.72 kJ to raise the temperature of 400 g of ethanol from 20 °C to 60 °C.
Learn more about sensible heat:
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