vault backup: 2025-11-28 09:51:15

content/Biokemi/Gamla tentor/2022-05-16/15.md

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+---
+tags:
+  - biokemi
+  - provfråga
+  - termodynamik
+---
+A biologist studying a new bacterial strain identified in Göteborg is interested in the following two new biochemical reactions:  
+
+P + H₂O -> Q + Pi (∆G = -38 kJ/mol)  
+X + Y -> Z + H₂O (∆G = +55 kJ/mol)  
+
+What does ∆G mean in Thermodynamics? Which of the two reactions is spontaneous and what is the explanation for this? /  
+En biolog som studerar en ny bakteriestam som har identifierats i Göteborg är intresserad av följande biokemiska reaktioner:  
+
+P + H₂O -> Q + Pi (∆G = -38 kJ/mol)  
+X + Y -> Z + H₂O (∆G = +55 kJ/mol)  
+
+Vad avses med ∆G inom termodynamiken? Vilken av reaktionerna är spontan och vilken är anledningen till det?  
+
+This question needs to be answered in English. (2p) (Max 100 words)
+
+**Answer**
+
+G (Gibbs free energi) means the change of free energy in the system. Delta-G explains how the free energi in the system change after a specific reaction. Negative delta-G means the reaction is spontaneous, while positive delta-G indicates that the reaction is not spontaneous and is not thermodynamicly favorable. The spontaneous reaction is P + H₂O -> Q + Pi because it has negativ Delta-G.