When getting coffee, the people at Starbucks ask, “Do you want to leave room for sugar and cream?” Do I need to leave space if I just add sugar?

Question answered by Catherine Riddle, PhD, Radiochemist, Idaho National Laboratory The chemistry of coffee is complex to start with so adding sugar, milk or both makes it even more so. There are many systems at work in a cup of coffee including density, inter-molecular spacing, temperature and concentration. Believe it or not, there is a…