## Heat Exchange Systems

# heat exchange systems

**A Portland couple help raise a crop of organic foods and reap some personal independence**

We decided to leave our Portland lives behind to spend the summer volunteering on organic farms.

**physics problems, has answer choices, have to do with heat and gas exchange?**

1. a certain ideal gas has a value of p = 4/3. what is its molar specific heat at constant pressure?

a) 5R/2

b) 3R

c) 7R/2

d) 4R

2. 330 g of water at 35 deg. C are poured into an 855.0 g aluminum container with an initial temperature of 10 deg. C. the specific heat of aluminum is 900 J/(kg * K). what is the final temperature of the system, assuming no heat is exchanged with the surroundings?

a) 25 deg. C

b) 26 deg. C

c) 27 deg. C

d) 28 deg. C

3. 550 g of water at 75 deg. C are poured into an 855.0 g aluminum container with an initial temperature of 11 deg. C. the specific heat of aluminum is 900 J/(kg * K). how much heat flows from the water to the aluminum, assuming no heat is exchanged with the surroundings?

a) 35 kJ

b) 36 kJ

c) 37 kJ

d) 38 kJ

2.

330 x 4.186 ( T – 35) = – 855 x 0.900 J/g°C ( T – 10)

1381 T – 48348 = – 769.5 T + 7695

2150.5 T = 56043

T = 26 °C

**Heat Exchanger Shellside Cleaning System (NBL Corp.)**

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