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Standard XII

Chemistry

Relation between Cp and Cv

Five moles of...

Question

Five moles of hydrogen gas are heated from 30 $^{o}$ C to 60 $^{o}$ C at constant pressure. Heat given to the gas is (given R $=$ 2 cal/mol degree)

750 cal

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630 cal

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1050 cal

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1470 cal

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Solution

The correct option is A 1050 cal
Hydrogen is diatomic.
Hence, molar heat capacity, $C_{p} = 3.5 R$
Also change in temperature= $Δ T = 30 K$ , no.of moles, $n = 5$
Hence, heat absorbed= $Δ Q = n C_{p} Δ T = 5 \times 3.5 \times 2 \times 30 = 1050 c a l$

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Similar questions

Q. Five moles of hydrogen gas are heated from

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60^{\circ} C

at constant pressure. Heat given to the gas is (given

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Five moles of hydrogen gas are heated from 30oC to 60oC at constant pressure. Heat given to the gas is (given R = 2 cal/mol degree)

The correct option is A 1050 calHydrogen is diatomic.Hence, molar heat capacity, Cp=3.5RAlso change in temperature=ΔT=30K, no.of moles, n=5Hence, heat absorbed=ΔQ=nCpΔT=5×3.5×2×30=1050cal

Five moles of hydrogen gas are heated from 30 $^{o}$ C to 60 $^{o}$ C at constant pressure. Heat given to the gas is (given R $=$ 2 cal/mol degree)

The correct option is A 1050 cal
Hydrogen is diatomic.
Hence, molar heat capacity, $C_{p} = 3.5 R$
Also change in temperature= $Δ T = 30 K$ , no.of moles, $n = 5$
Hence, heat absorbed= $Δ Q = n C_{p} Δ T = 5 \times 3.5 \times 2 \times 30 = 1050 c a l$