## 4A.1

$\Delta U=q+w$

Shanzey
Posts: 120
Joined: Wed Sep 18, 2019 12:20 am

### 4A.1

For question 4A.1b, why is coolant in a refrigerator coil a closed system? Also, for 4A.1f, why is a living plant an open system?

chrisleung-2J
Posts: 112
Joined: Fri Aug 09, 2019 12:17 am
Been upvoted: 1 time

### Re: 4A.1

Coolant in a refrigerator coil is a closed system but not isolated since it likely allows for some leakage of heat with the surroundings. Likewise, a plant can be considered an open system because it allows for the exchange of gases and heat with the surroundings.

Sofia Barker 2C
Posts: 101
Joined: Wed Sep 18, 2019 12:21 am

### Re: 4A.1

A living plant is considered an open system because it can exchange both energy and matter with its surroundings. Its ability to perform photosynthesis and absorb nutrients from soil are examples of energy and matter exchange.