Chapter 21, Problem 21.2QQ

(i) How does the internal energy of an ideal gas change as it follows path i → f in Figure 20.4? (a) E_int increases. (b) E_int decreases. (c) E_int stays the same. (d) There is not enough information to determine how E_int changes. (ii) From the same choices, how does the internal energy of an ideal gas change as it follows path f → f′ along the isotherm labeled T + ΔT in Figure 20.4?

Figure 20.4 Energy is transferred by heat to an ideal gas in two ways.