need help with both please 11) A 5.00 ml pressure remairn A) 2.50 ml B) 4.55 ml

Question

need help with both please

11) A 5.00 ml pressure remairn A) 2.50 ml B) 4.55 ml C) 5.00 mL D) 5.50 mL e) 10.0 mL Section: 10.5 Charles's Law: Volume-Temperature Relationships mL volume of methane gas is cooled from 60.0·C to 30.0·C. If the ssure romains constant, what is the final volume in milliliters? from 224K to 448K. If the volume remain 12) A sample of air at 7.50 atm is heated constant, what is the final pressure? A) 3.75 atm B) 4.57 atm C) 6.15 atm D) 12.3 atm E) 15.0 atm Section: 10.6 Gay-Lussac's Law: Pressure-Temperature Relationships

Explanation / Answer

Given pressure = constant

So Volume is directly proportion to temperature using ideal gas equation Pv = nRT

Vi /Ti = Vf /Tf ( Charles's law)

5 /(60+273) = Vf / (30+273)

Vf = 4.55 mL

Option B

12) Gay-Lussac's law states that when volume is constant

Pressure is directly proportional to temperature

so Pi/Ti = Pf/Tf

7.5/224 = Pf/448

Pf = 15 atm

Option E

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