Five moles of hydrogen gas are heated from 30- C to 60- C at constant pressure- Heat given to the gas is given R-2 cal-mol- C

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Standard XII

Physics

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Five moles of...

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Five moles of hydrogen gas are heated from $30^{\circ} C$ to $60^{\circ} C$ at constant pressure. Heat given to the gas is (given $R = 2 c a l / m o l^{\circ} C$ )

750 c a l

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630 c a l

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1050 c a l

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1470 c a l

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Solution

The correct option is C $1050 c a l$
At constant pressure, the heat supplied to a gas is the same as its change in enthalpy,
Thus, Q = $n C_{p} Δ T$
$C_{p} = 3.5 R$
Q = $5 \times 7 \times 30$
$Q = 1050 c a l$

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

The correct option is C 1050calAt constant pressure, the heat supplied to a gas is the same as its change in enthalpy,Thus, Q = nCpΔTCp=3.5RQ = 5×7×30Q=1050 cal

Five moles of hydrogen gas are heated from $30^{\circ} C$ to $60^{\circ} C$ at constant pressure. Heat given to the gas is (given $R = 2 c a l / m o l^{\circ} C$ )

The correct option is C $1050 c a l$
At constant pressure, the heat supplied to a gas is the same as its change in enthalpy,
Thus, Q = $n C_{p} Δ T$
$C_{p} = 3.5 R$
Q = $5 \times 7 \times 30$
$Q = 1050 c a l$