Which of the following conditions will result in a reaction that is spontaneous at all temperatures?
a. positive enthalpy change and positive entropy change
b. negative enthalpy change and positive entropy change
c. positive enthalpy change and negative entropy change
d. negative enthalpy change and negative entropy change
d. liquid water is less dense than solid water

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.