## 4C.1

$\Delta U=q+w$

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

### 4C.1

Why does NO2 having more atoms give it a higher molar heat capacity compared to NO? The solutions manual says that it is because NO2 has more bonds to absorb added energy, but I am not really sure of what this means.

Tracy Tolentino_2E
Posts: 140
Joined: Sat Sep 07, 2019 12:17 am

### Re: 4C.1

Molar heat capacity is affected by molar mass. NO2 has a higher molar heat capacity because it is a larger molecule due to being bonded with 2 oxygen molecules instead of 1 like NO. Along with that, NO2 has a higher molar mass than NO.

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

### Re: 4C.1

Molar heat capacity increases as the complexity of a molecule increases because complex molecules have more ways to rotate and vibrate, and these motions store heat.