An arctic weather balloon is filled with 49.2 L of helium ga…

An arctic weather balloon is filled with 49.2 L of helium gas inside a prep shed. The temperature inside the shed is 11.0 C. The balloon is then taken outside, where the temperature is -31.0 C. Calculate the new volume of the balloon. Assume helium gas is an ideal gas and the pressure on the balloon stays constant. T (in K) = T (in C) + 273.15. 

A chemical reaction takes place inside a flask submerged in…

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 7.40 g of water at 20.3 C. During the reaction, 145 J of heat flows out of the bath and into the flask. The heat capacity of water is 4.18 J/(gK). Calculate the new temperature of the water bath.  q=cmT. 

Measurements show that the energy of a mixture of gaseous re…

Measurements show that the energy of a mixture of gaseous reactants increases by 264 KJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that 82 KJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture during the reaction.