diff --git a/python_tutorial.ipynb b/python_tutorial.ipynb
index bb6cb52..d88af3a 100644
--- a/python_tutorial.ipynb
+++ b/python_tutorial.ipynb
@@ -177,7 +177,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Notice that the temperature has been changed as requested, but the pressure has changed too. The density and the composition have not.\n",
+    "Notice that the temperature has been changed as requested, but the density has changed too. The pressure and the composition have not.\n",
     "\n",
     "Thermodynamics generally requires that *two* properties in addition to composition information be specified to fix the intensive state of a substance (or mixture). The state of the mixture can be set using several combinations of two properties. The following are all equivalent:"
    ]