When 175.OmL of water containing HCl at 21.0°C is added to 35.OmL of water containing NaOH at 21.0°C in a foam cup calorimeter, the
temperature of the solution increases to 39.6°C. Calculate the enthalpy
change of this reaction.

Agas at 155 kpa and standard temperature has an initial volume of 1.00 l. the pressure of the gas rises to 500 kpa as the temperature also rises to 135°c. what is the new volume? 2.16 l 0.463 l 0.207 l 4.82 l

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms