- #1

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- Homework Statement
- Please see below

- Relevant Equations
- Please see below

For part(b),

My solution is,

##\Delta E_{int} = Q - W = \frac{3}{2}(P_fV_f - P_iV_i)##

##Q = W + \frac{3}{2}(P_fV_f - P_iV_i)##

##Q = 4000 + \frac{3}{2}((1 \times 10^6)(6 \times 10^{-3}) - (3 \times 10^6)(2 \times 10^{-3})##

##Q = 4000 J##

However, according to the solution b. ##−4000 J##

Can someone please tell me what I did wrong?

Many thanks!

My solution is,

##\Delta E_{int} = Q - W = \frac{3}{2}(P_fV_f - P_iV_i)##

##Q = W + \frac{3}{2}(P_fV_f - P_iV_i)##

##Q = 4000 + \frac{3}{2}((1 \times 10^6)(6 \times 10^{-3}) - (3 \times 10^6)(2 \times 10^{-3})##

##Q = 4000 J##

However, according to the solution b. ##−4000 J##

Can someone please tell me what I did wrong?

Many thanks!