we know that,
W = mL + mcθ
W= 10(336+ 4.2(50))= 5460 kJ
so quantity of heat required is 5460 J
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Answer: The original mass of the sample of Uranium-235 is 0.7308 mg
Explanation:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant
a - x = amount left after decay process
a) for calculating rate constant
b) for time of years
The original mass of the sample of Uranium-235 is 0.7308 mg
The heat from your hand would be absorbed by the (assumed) colder flask, since an endothermic reaction means that the reaction requires an absorption of heat as opposed to an exothermic reaction, which releases heat.