An atom of hydrogen and an atom of carbon are
1 answer:
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<u>Answer:</u> The equation to calculate the mass of remaining isotope is
<u>Explanation:</u>
The equation used to calculate rate constant from given half life for first order kinetics:
where,
= half life of the reaction =
Putting values in above equation, we get:
Rate law expression for first order kinetics is given by the equation:
where,
k = rate constant =
t = time taken for decay process
= initial amount of the sample = 20 grams
[A] = amount left after decay process = ? grams
Putting values in above equation, we get:
Hence, the equation to calculate the mass of remaining isotope is
1. Q=112.8 kJ
2. Q=5.01 kJ
<h3>Further explanation</h3>The heat required for phase change :
- melting/freezing :
Q = mLf
Lf=latent heat of fusion
- vaporization/condensation
Q = mLv
Lv=latent heat of vaporization
1.
m=50 g=0.05 kg
Lv (water) = 2256 kJ/kg
2.
m=15 g=0.015 kg
Lf for water = 334 kj/kg