A student asks why the ashes from a fire have a much lower mass than the wood that was burned. Which is the correct answer to the student’s question?

A. Gases are released into the air
B. Atoms in the wood are destroyed
C. Heat causes molecules to lose identity
D. Water inside the wood solidifies

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign