Calculate the molar heat of reaction for the NaOH(aq) using the data obtained from this experiment. (this is a neutralization question)

Question

H2so4
Volume= 30ml
Concentration=1.0mol/l
Initial temp. = 29.9

NAOH
Volume= 50ml
C = 1.0 mol/L
Initial temp. = 29

Final temp of the two contents = 32.9

This is my solution:

El = Eg
NaOH H2O

nH = mc∆t

0.05mol x H = 0.08L x 4.19 x 3.9

H = 26.15

The standard molar heat of neutralization of sodium hydroxide,
is -57 kJ/mol.

so shouldn't my calculated value be close to the standard value? Please tell me whether my solution is right or wrong!

Thank you in advance =)