Please help !!! -5. A balloon contains gas at a pressure of 1.22 X 105 Pa and a

Question

Please help !!! -5. A balloon contains gas at a pressure of 1.22 X 105 Pa and a volume of 0.10 m. More gas is pumped into the balloon at constant pressure until the volume is doubled. How much work is done by the pump? a. 12 J b. 24 kJ c. 12 kJ d. 6.1 kJ A 6. An ideal gas undergoes an isovolumetric (isometric) process while releasing 25 J of heat. What is the change in its internal energy? b. 25J c. 50 J d. -25J 7. An isothermal process refers to the fact that a. the volume remains constant b. the temperature remains constant c. the internal energy in not constant d. no heat is transferred between a system and its surroundings Determine the work done by 4 moles of a monatomic ideal gas as it expands isothermally at 0°C to two times its initial volume, a. 2.5X 10J b. 1.5 X 104J c. 6.2X 103J 8. R = 8.314 J/mole-K d. Zero

Explanation / Answer

5) pressure = 1.22*10^5 Pa , Volume = 0.1 m3

New volume = 0.2 m3

Work = P*dV

= 1.22*10^5 * ( 0.2 - 0.1) = 1.22*10^4 J = 12.2 kJ

6) Isometric process = volume change = 0

so work done = 0

Q = U + W

25 = U + 0

U = 25 J

option b) 25 J is the correct answer

7) Isothermal process is temperature remains constant

so option b) the temperature remains constant

8) W = nRT ln (V2 / V1)

= 4*8.314*(273) * ln ( 2)

= 6293 kJ = 6.2*10^3 J

so option C) is the correct answer

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---