I'm only stuck on the first two. For the first one I know how to do the version of this problem when it is done at a constant volume because the amount of work is zero. I am trying to use that same approach but nothing here is equal to zero because work is being done. So I am having trouble seeing how to relate these three quantities. And for the second one, I do not know how to apply the problem given since p is not given

HW 3 Prob. 1 A quantity of heat Q is added to a volume V of an ideal argon gas at temperature T and pressure p while keeping the pressure constant, what are the change in temperature, enthalpy, and internal energy? Practice enthalpy and 1 st Law. HW 3 Prob. 2 The latent heat of vaporization of water is Ah, = 2257 kJ/kg, where lower case h is for "specific value".. per mol, kg, or m') at 100 C and 1 atm. Calculate the change in internal energy of water Au, when water boils. Densities of water and steam at 100 C are 957 kg/m' and 0.597 kg/m', respectively. 1 atm =1.013 x 105 Pa. Remember Ah = Au + pAV. HW 3 Prob. 3 Your 200-g cup of tea is boiling-hot. About how much ice should you add to bring it down to a comfortable sipping temperature of 65 C? (Assume that the ice is initially at -15 C. The specific heat capacity of ice is 0.5 cal/g. C. The specific heat of tea and water is 1 cal/g.C.) Latent heat of melting of ice is 80 cal per gram. msi RGI