![]() ![]() That would tell you that some of the water evaporated. You can test it to see if it's denser and also if it's more viscous than the starting liquid. The second test is the Low Temperature Pumping test - Is the oil. If a hospital or care home currently uses syringes that do not conform, the IDDSI assumption. If the syringe used does not conform, it may give incorrect results. How did you actually do the experiment? What did you drip the liquid through? More importantly, how did you heat it? Could water have evaporated? Here's a test you could run. The higher viscosity oil takes longer to drip through this machine called a viscometer. To conform with the IDDSI Syringe Test, the length from the 0 to the 10 ml mark on the syringe’s barrel must be 61.5 mm but not all syringes in all clinical settings conform to this. It's a bit surprising that even the PZ viscosity went up, since it doesn't sound like it has much in it to increase its viscosity. That might be a strong enough effect to beat the viscosity reduction from heating, so the viscosity would go up instead of down. That would leave the ones with sugar more sugary and viscous than they started out. Maybe as you heated the liquids, some of the water evaporated. There are a few salts and some citric acid in the PZ and those should slightly increase its viscosity, but again heating should reduce the viscosity. The sugars, including maltodextrin, in Kool Aid increase the viscosity, and that extra viscosity also goes down as they're heated. We aren't sure why the viscosities of your Kool Aid and Propel Zero don't also go down when heated. In the hotter water the molecules shake loose from each other more easily, so it's less sticky. It's certainly true that water will drip faster when it's hotter.
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