According to Arrhenius equation,
k=Ae−Ea/RT
lnk=lnA−EaRT
logk=logA−Ea2.303RT
Comparing with the given equation,
Ea2.303RT=1.0×104KT
Ea=2.303R×1.04×104K
Ea=2.303(8.314JK−1mol−1)×1.0×104K
Ea=191.47kJmol−1
Half-life period, t(1/2)=200minutes
Rate constant, k=0.693t(1/2)
k=0.693200
k=0.3465min−1