From 26ea138d8d16c5c98187c803ec6694d345140a26 Mon Sep 17 00:00:00 2001
From: Drew Camron <dcamron@ucar.edu>
Date: Fri, 3 Jan 2025 12:22:39 -0700
Subject: [PATCH] Reduce array ops

---
 src/metpy/calc/thermo.py | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/metpy/calc/thermo.py b/src/metpy/calc/thermo.py
index bc6378538c..48f18d4a6f 100644
--- a/src/metpy/calc/thermo.py
+++ b/src/metpy/calc/thermo.py
@@ -59,13 +59,14 @@ def moist_air_gas_constant(specific_humidity):
 
     Notes
     -----
+    Adapted from
+
     .. math:: R_m = (1 - q_v) R_a + q_v R_v
 
     Eq 16, [Romps2017]_ using MetPy-defined constants in place of cited values.
 
     """
-    return ((1 - specific_humidity) * mpconsts.nounit.Rd
-            + specific_humidity * mpconsts.nounit.Rv)
+    return mpconsts.nounit.Rd + specific_humidity * (mpconsts.nounit.Rv - mpconsts.nounit.Rd)
 
 
 @exporter.export
@@ -98,13 +99,15 @@ def moist_air_specific_heat_pressure(specific_humidity):
 
     Notes
     -----
+    Adapted from
+
     .. math:: c_{pm} = (1 - q_v) c_{pa} + q_v c_{pv}
 
     Eq 17, [Romps2017]_ using MetPy-defined constants in place of cited values.
 
     """
-    return ((1 - specific_humidity) * mpconsts.nounit.Cp_d
-            + specific_humidity * mpconsts.nounit.Cp_v)
+    return (mpconsts.nounit.Cp_d
+            + specific_humidity * (mpconsts.nounit.Cp_v - mpconsts.nounit.Cp_d))
 
 
 @exporter.export