Figure shows a graph in log10 K vs 1T where K is rate constant and T is temperature. The straight line BC has slope, |tanθ|=12.303 and an intercept of 5 on y-axis. Thus EA, the energy of activation is:
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a
2.303×2 cal
b
2/2.303 cal
c
2 cal
d
2.3032cal
answer is C.
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Detailed Solution
log10 K vs. 1T is linear; slope=−EA2.303R intercept = log10ASince, |tanθ|=12.303∴ EA2.303R=12.303⇒Ea=R=2cal