Calorimetry, finding final temperature
n(HNO3)= 0.055L * 1.30 mol\L = 0.0715 mol
Delta H = 0.0715 mol * -53.4 kJ/mol =3.818kJ 
Delta H = mc delta t
3818J = (110g)(4.19J/g*C)(delta t) 
Delta t = 8.3*C 
Ti + Tf = 21.4*C + 8.3*C = 29.7*C