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Dafna11 [192]
3 years ago
12

U-236 spontaneously decays to Br-87, X and three neutrons. What is element “X”? 1. Th 2. Pb 3. Ra 4. La 5. Ba

Chemistry
1 answer:
Elena-2011 [213]3 years ago
6 0
<span>U-236 spontaneously decays to Br-87, X and three neutrons. The element X is 4. La, also known as Lanthanum, number 57 in the periodic system of elements.</span>
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Answer:

a)  T_b=590.775k

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Explanation:

From the question we are told that:

Moles of N2 n=2.50

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a)

Generally the equation for change in temperature is mathematically given by

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T_b-T_a=\frac{1.36 * 10^4 J}{2.5*20.76 }

T_b-293k=297.775

T_b=590.775k

b)

Generally the equation for ideal gas is mathematically given by

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For v double

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 T_c=1181.55k

Therefore

PV=Wbc

Wbc=(2.20)(8.314)(1181_590.778)

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W_t=1.08*10^4J

c)

Generally the equation for amount of heat added is mathematically given by

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Q=2.20*2907*(1181.55-590.775)\\

Q=3.778*10^4J

d)

Generally the equation for change in internal energy of the gas is mathematically given by

\triangle V=nC_v \triangle T

\triangle V=2.20*20.76*(1181.55-293)k

\triangle V=4.058*10^4J

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