Which of the following observation is/are consistent with a chemical reaction(s)?
A. Propane forms a flame and emits heat as it burns change in temp Not consistent with chem reaction
B. Acetone feels cold as it evaporates from skin. change in temp Not consistent with chem reaction
C. Bubbling occurs when potassium carbonate and evolution of a gas Consistent with a chem reaction hydrochloric acid are mixed together
D. Heat is felt when a warm object is placed in your hand. change in temp Not consistent with chem reaction
E. A mixture of sugar and water bubbles when yeasts are evolution of a gas Added Not consistent with a chem reaction