Which statement best describes the direction of heat flow by conduction between two samples of the same material?
heat flows from faster molecules to slower molecules when they are near.
heat flows from faster molecules to slower molecules when they collide.
heat flows from slower molecules to faster molecules when they are near.
heat flows from slower molecules to faster molecules when they collide.
i was once told it was not c but that didnt me.

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?