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Calculate DE, and determine whether the process is endothermic or exothermic for the following cases:
(a) A system releases 43 kJ of heat to the surroundings and has 665 kJ of work done on it by the surroundings.
DE = kJ. This process is.
(b) q = 35 kJ and w = -287 kJ.
(c) A system absorbs 246 kJ of heat from the surroundings and has 766 kJ of work done on it by the surroundings.
What would happen if you increase the pH of this acidic solution by addition of a strong base such as KOH? b.) Write the balanced equation for the reaction (a.) and identify both the stronger acid and base and the weaker acid and base.
It then gives off a photon having a wavelength of 4.10 × 102 nm. What is the final state of the hydrogen atom? Values for physical constants can be found here.
Calculate the molarity of a solution containing KCI and water whose osmotic pressure at 31.4 degrees Celsius is 125 torr. Assume complete dissociation of the salt. What are the steps to arrive at an answer of 0.00329M
The total precipitate was dissolved in HCl + HNO3. When the solution thus formed was treated with excess NaOH followed by H2O2, a colorless solution and a reddish brown precipitate were formed. The precipitate was found to be soluble in HCl, H2SO4..
how many grams of NO2 will be produced when 2.0 L of nitrogen at 840 mmHg and 24 C are completely reacted N2+2 O2-----2 NO2
What is the minimium wavelength of light necessary to ionize an atom of sodium? what is the minimum wavelength of light necessary to ionize a mole of sodium atoms?
Determine the rate constant. b. What fraction of the initial N2O5 will remain after 13.0 h c. What is the half-life. d. If the initial concentration of N2O5 was 0.222 M, then what concentration remain after 24 h
How would you write the Sn2 mechanism of sodium chlorophenolate with sodium chloroacetate?
Describe the nature and characteristics of PCB s. Why are they of importance to an EH&S or FS professional who encounters them when.
If the concentration of H2 in the equilibrium mixture is 0.426 M, what mass of methanol was initially introduced into the vessel?
Why do some scientists have concerns have regarding further increases in bio fuel production. giving chemical reasons explain why is is expensive to manufacture ethanol from cellulose.
When 1 mole of H2(g) reacts with C2H4(g) to form C2H6(g) according to the following equation, 137 kJ of energy are evolved. What is the value of q?
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