What is the work done on the gas as it expands from pressure P1 ...

[Sufayan.ah]

What is the work done on the gas as it expands from pressure P₁ and volume V₁ to pressure P₂ and volume V₂ along the indicated straight line?
 
   
   
  a.
  (P₁  P₂)(V₁  V₂)/2
  b.
  (P₁ + P₂)(V₁  V₂)
   
  c.
  (P₁ + P₂)(V₁  V₂)/2
  d.
  (P₁ P₂)(V₁ + V₂)

Question 2

An ideal gas at pressure, volume, and temperature, P₀, V₀, and T₀, respectively, is heated to point A, allowed to expand to point B also at As temperature 2T₀, and then returned to the original condition. The internal energy decreases by 3P₀V₀/2 going from point B to point T₀. How much heat left the gas from point B to point T₀?
 
   
   
  a.
  0
  b.
  P₀V₀/2
   
  c.
  3P₀V₀/2
  d.
  5P₀V₀/2

[krakiolit]

Answer to Question 1

c

Answer to Question 2

d

[Sufayan.ah]

Gracias!

[helenmarkerine]

Thanks for the timely response, appreciate it