Correct

气化

/ qì huā / 
Strokes

Definition

to vaporize/evaporation/carburetion/气[qì] transformation in TCM (i.e. transformation of yin yang vital breath)/unvoicing of voiced consonant

Example

As a Verb

gasify

1
Yètài
液态
ān
氨
jí
极
yì
易
qìhuā
气化
  
。

Liquid ammonia gasifies readily.

2
Méi
煤
de
的
qìhuā
气化

gasification of coal

3
Jiāng
将
ránliào
燃料
qìhuā
气化

gasify the fuel