diff --git a/dimsim/configs/compute/enthalpy_of_mixing.py b/dimsim/configs/compute/enthalpy_of_mixing.py
new file mode 100644
index 0000000..891630a
--- /dev/null
+++ b/dimsim/configs/compute/enthalpy_of_mixing.py
@@ -0,0 +1,17 @@
+import typing
+
+from dimsim.configs.targets.thermo import DataEntry
+
+
+class EnthalpyOfMixingConfig(typing.TypedDict):
+    tag: typing.Literal["enthalpy_of_mixing"] = "enthalpy_of_mixing"
+
+    target: DataEntry
+
+    force_field: str
+
+    n_molecules: int
+
+    """
+    Maybe add an RNG seed?
+    """