3 years ago

Order frome largest to smallest Allele,Chromosome,DNA, nucleus of a cell

Chemistry

1 answer:

svetlana [45]3 years ago

5 0

Allele, dna, chromosome, nucleus of a cell

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Answer: 4.18925 kJ heat is needed to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50°C.

Explanation:

Temperature of Solid $C_2H_5OH=-135^oC=138 K(0^oC=273K)$

Melting temperature of Solid $C_2H_5OH=114^oC=159 K$

Temperature of liquid $C_2H_5OH=-50^oC=223K$

Specific heats of solid ethanol = 0.97 J/gK

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Heat required to melt the the 25 g solid $C_2H_5OH$ at 159 K

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Heat required to melt and raise the temperature of $C_2H_5OH$ upto 223 K

$\Delta T_2$ = 223 K - 159 K = 64 K

$Q_2=mc\Delta T= 25\times 2.3J/gK\times 64 K=3680 J$

Total heat to convert solid ethanol to liquid ethanol at given temperature :

$Q_1+Q_2=509.25 J+3680 J=4189.25 J=4.18925 kJ$ (1kJ=1000J)

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Order frome largest to smallest Allele,Chromosome,DNA, nucleus of a cell​

Order frome largest to smallest Allele,Chromosome,DNA, nucleus of a cell