A
3. Which of the following observations could be an indication of a chemical
A reaction of antimony?
It burns in an atmosphere of chlorine.
b It melts at 631°C.
It expands upon freezing.
d It is a solid at room temperature.
с

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

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

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %