The conservation of mass equation for a control volume can be written as: The physical meaning of the two terms A and B are:

The answer for #3 is c but i don't know why

Predict the products butane (c4h10) + oxygen —>

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.