A sample of gas with a volume of 750 mL exerts a pressure of 98 kPa at 30◦C. What pressure will the sample exert when it is compressed to 250 mL and cooled to - 25◦C?

1. 26.7 kPa

2. 359 kPa

3. 353 kPa

4. 241 kPa

5. 39.9 kPa

Question

Spanky

Physics

14 December, 20:16

A sample of gas with a volume of 750 mL exerts a pressure of 98 kPa at 30◦C. What pressure will the sample exert when it is compressed to 250 mL and cooled to - 25◦C?

1. 26.7 kPa

2. 359 kPa

3. 353 kPa

4. 241 kPa

5. 39.9 kPa

+5

Answers (1)

Know the Answer?

Jabari Cobb · Answer 1

Answer: 4) 241kPa

Explanation:

Using the formula for general gas equation

P1V1/T1 = P2V2/T2

P = pressure V = volume T = temperature in Kelvin

Since 0°C = 273K

30°C = 30+273 = 303K

-25°C = - 25+273 = 248K

Given P1=98kPa V1 = 750mL T1 = 303K, P2=? V2 = 250mL T2 = 248K

Substituting into the formula to get P2, we have

98*750/303 = P2*250/248

P2 = 98*750*248/303*250

P2 = 18,228,000/75,750

P2 = 241kPa.

A sample of gas with a volume of 750 mL exerts a pressure of 98 kPa at 30◦C. What pressure will the sample exert when it is compressed to 250 mL and cooled to - 25◦C?1. 26.7 kPa2. 359 kPa3. 353 kPa4. 241 kPa5. 39.9 kPa

A sample of gas with a volume of 750 mL exerts a pressure of 98 kPa at 30◦C. What pressure will the sample exert when it is compressed to 250 mL and cooled to - 25◦C?

1. 26.7 kPa

2. 359 kPa

3. 353 kPa

4. 241 kPa

5. 39.9 kPa