Brady THT-141-488-3 0.9" Width x 0.9" Height, B-488 High Performance Polyester, Matte Finish White Thermal Transfer Printable Label (3000 per Roll)

all right so when we calculated these heat problems now we found that the answer to this one ended up positive in the answer this one ended up positive we have a change in temperature here so Q is equal to M C and Delta T just like the video we did on heat calculations we have mass the specific heat of liquid water and then the change in temperature final 100 minus the initial 25 and so it ends up being a positive value for the heat second one ended up a positive value for the heat the next one here the temperature is now going from 75 down to zero so again final minus initial and we ended up with a negative value for the heat and then we talked about what does it mean to be released so how much heat is needed to boil and how much heat is released when it freezes so let's have a little discussion on positive and negative values and the concept is called thermodynamics and the value posi