When a solid turns to gas it is called sublimation, and when a gas turns into a liquid it is called deposition
PH= −log
10
[H
+
]
= −log
10
(0.001)
= −log
10
(10
−3
)
= −(−3)log
10
10
pH=3.
01
Im not sure but it could be 4 (H)
Liquid :) it goes directly from a solid to a gas. Have a nice day!
