Consider a reaction that has a positive δh and a positive δs. which of the following statements is true? a) this reaction will be spontaneous only at high temperatures. b) this reaction will be spontaneous at all temperatures. c) this reaction will be nonspontaneous at all temperatures. d) this reaction will be nonspontaneous only at high temperatures. e) it is not possible to determine without more information.

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt