Question

way home ing pressure relationships is correct? 1. Which of the following press a. 650 ton atm b. 760 ton 760 mm Hg c. 1 atm 15.8 psi d. more than one correct response e. no correct response 2. Indicate what the missing words are in the follo volume of a gas sample is proportiona following statement of Charles's law: At constant pressure, the Proportional to its temperature. a. directly, Kelvin b.inversely, Kelvin c. directly, Celsius d. inversely, Celsius 3. If a sample of gas has a volume determine its new volume in liters at T = 77.0°C and P = 3.88 atm. -2L, a pressure of 1.70 atm, and a temperature of 27.0°C, 4.Carry out the following unit conversions using dimensional: analysis: a) 725 mm Hg to atmospheres atm b) 1.15 atm to mm Hg mm Hg c) 47.0°C to Kelvin (K) SOFESSOR NANA KARIKARI

Answer 1

1.Ans :- Option (b) " 760 torr = 760 mmHg " is the correct conversion. Remaining conversions are wrong.

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2. Ans :- Option (a) " directly, Kelvin " is the correct answer.

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3. Sol :- From ideal gas equation :

P₁V₁ / T₁ = P₂V₂/T₂

So,

V₂ = P₁V₁T₂ / P₂T₁

V₂ = (1.70 atm).(11.2 L).(273+27)K / (3.88 atm).(273+77)K

V₂ = 16.32 L

Hence, Volume = 16.32 L

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4. Sol :-

a). 725 mmHg = 0.953948 atm

b). 1.15 atm = 873.9999 mmHg

c). 47.0 ⁰C = 320.15 K

Answer 2

ANSWER :

1. Option b : 760 torr = 760 mm Hg

2. Option a : directly ; Kelvin

3.

p1 V1 = kT1

p2V2 = kT2

=> p2V2/(p1V1) = T1/T2

=> V2 = T1p1V1 / (T2p2) = (273+27)*1.70*11.2 / ((273+77)*3.88) = 4.21 L (ANSWER)

4.

a. 725 mm Hg = 725/760 atm = 0.954 atm

b. 1.15 atm = 1.15*760 = 874 mm Hg

c. 47ºC = 47 + 273 = 320 K