I removed the \[InvisiblePrefixScriptBase]
and changed {V, 0, 2}
to {T, 0, 2}
(which I think is correct). The kernel crashes when the NSolve
is evaluated. I am running 12.3.0 for Mac OS X x86 (64-bit) (May 10, 2021). Are you able to reproduce the crash? If so, you should report it to Wolfram Support. If you cannot, please respond here so I can report it.
NDSolve[{T'[
V] == (Ua (Subscript[T, a] -
T[V]) + (-Subscript[r, a]) (-Subscript[\[CapitalDelta]H,
R]))/(Subscript[F,
ao] (Subscript[C, pA] + X[V] Subscript[\[CapitalDelta]C, p])),
X'[V] == -Subscript[r, A]/Subscript[F, Ao], X[0] == 0,
T[0] == 1035}, {T[V], X[V]}, {T, 0, 2}]