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Answer the following in one or two sentences.
Comment on the statement:
no work is involved in an expansion of gas in a vacuum.
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Answer in brief.
Derive the expression for PV work.
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Answer the following question.
One mole of an ideal gas is compressed from 500 cm3 against a constant pressure of 1.2 × 105 Pa. The work involved in the process is 36.0 J. Calculate the final volume.
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Answer the following question.
Calculate the work done during the synthesis of NH3 in which volume changes from 8.0 dm3 to 4.0 dm3 at a constant external pressure of 43 bar. In what direction the work-energy flows?
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Answer the following in one or two sentences.
What are the units for rate constants for zero-order and second-order reactions if time is expressed in seconds and concentration of reactants in mol/L?
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Answer the following in one or two sentences.
Write the relationships between rate constant and half-life of the first order and zeroth-order reactions.
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Answer the following in one or two sentences.
How do the half-lives of the first order and zero-order reactions change with the initial concentration of reactants?
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Answer the following in brief.
Obtain the relationship between the rate constant and half-life of a first-order reaction.
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Answer the following in brief.
How will you represent the zeroth-order reaction graphically?
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What are pseudo-first-order reactions?
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Answer the following in brief.
Derive the integrated rate law for the first-order reaction.
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How will you represent first order reactions graphically.
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Answer the following in brief.
Derive the integrated rate law for the first-order reaction,
\[\ce{A_{(g)} -> B_{(g)} + C_{(g)}}\] in terms of pressure.
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Answer the following in brief.
What is a zeroth-order reaction?
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In a first-order reaction, the concentration of the reactant decreases from 20 mmol dm−3 to 8 mmol dm−3 in 38 minutes. What is the half-life of reaction?
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Solve
The half-life of a first-order reaction is 1.7 hours. How long will it take for 20% of the reactant to react?
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Answer the following.
What is the action of chlorine on Fe?
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Solve
A first-order reaction takes 40 minutes for 30% decomposition. Calculate its half-life.
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Answer the following.
How is hydrogen chloride prepared from sodium chloride?
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What is the action of hydrochloric acid on NH3?
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