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tia_tia [17]
4 years ago
9

Who earned a Nobel Peace Prize for their study of the photoelectric effect?

Chemistry
1 answer:
riadik2000 [5.3K]4 years ago
5 0
ALBERT ENSTIEN !!!!!
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A 500 mL sample of 0.5 M NaOH at 20 C is mixed with an equal volume of 0.5 M HCl at the same temperature in a calorimeter. The t
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Answer: Heat of reaction ∆H = -13.43kJ

Explanation:

The number of moles of NaOH = the number of moles of HCL = N

N = concentration × volume= CV = 0.5M × 500mL/1000ml/L

N= 0.5 × 0.5= 0.25mol

Since the Molar enthalpy is given by Hm = -53.72kJ/mol

Heat of reaction ∆H = N×Hm

∆H= 0.25mol × -53.72kJ/mol = -13.43kJ

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A supersaturated solution holds less solute than it normally can.
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