An ice sculpture melts into a puddle of water. what is true of this reaction? it is spontaneous. energy had to be added to the system for the reaction to occur. the reaction happens faster if the ice sculpture is large. no work is done in this reaction.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".