In the issue, Mister Freeze froze Robin with his Cold Gun.
In our calculations, we will use the fact that the Cold Gun gives frostbite.
MISTER FREEZE’S COLD GUN
In
‘Batman: Mr. Freeze’ (1997) #1, Batman has recovered Mister Freeze’s Cold Gun. Successfully, he reverses the defrosting process of the Cold Gun. In the end, Robin is restored.

In
‘Batman: Mr. Freeze’ (1997) #1, Batman reverse-engineers Mister Freeze’s Cold Gun’s defrosting to save Robin and Gotham City. AP Photo/DC Comics.
To sum, Mister Freeze’s Cold Gun turns individuals into ice by giving them frostbite. Then, we will use this statement to calculate Robin’s frostbite.
NUMBER CRUNCHING
In the graphic novel, Mister Freeze gave Robin frostbite with his Cold Gun. As a matter of fact,
NHS defines frostbite as damage to skin and tissue as a result of exposure to temperatures below -0.55C° (31F).
Let’s calculate the heat capacity required to lower body temperature from 37C° to -0.55C°. First,
“Chapter 95 Cold Weather Survival Time” states water has a specific heat of 4186 J/kg C°. Second, the equation to calculate the heat capacity is:

Q = mcΔT = (57 kg)(4186 J/kg C°)(-0.55C° – 37C°) = -8959505.1 J.
ENERGY PROJECTION
To sum, Mister Freeze generated -8959505.1 J of heat capacity. Moreover, Mister Freeze had to generate a negative City Level of Energy Projection since he likely hit Robin with a blast 803.603118317 times greater than the power output of 6th Ave. New York skyscraper.