MCQ
Work done by $0.1$ mole of a gas at ${27^o}C$ to double its volume at constant pressure is ....... $cal$ ($R = 2 \,cal\, mol^{-1}$ $^oC^{-1}$)
- A$54$
- B$600$
- ✓$60$
- D$546$
✓
Answer
Correct option: C.
$60$
c
(c) $W = P\Delta V = nR\Delta T = 0.1 \times 2 \times 300 = 60\;cal$
(c) $W = P\Delta V = nR\Delta T = 0.1 \times 2 \times 300 = 60\;cal$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A boy is moving with a constant speed $v$ on a small trolley towards a distant circle as shown in the figure. A point mass is moving on the circle with a constant speed $v$, what is the frequency of change in magnitude of relative velocity of the point mass, as observed by the boy.
→If ${E}$ and ${H}$ represents the intensity of electric field and magnetising field respectively, then the unit of $E/H$ will be :
→Two superimposing waves are represented by equation $y_1=2 \sin 2 \pi(10 t-0.4 x)$ and $y_2=4 \sin 2 \pi(20 t-0.8 x)$. The ratio of $I_{\max }$ to $I_{\min }$ is ........
→The dimensions of surface tension are
A string is clamed at both the ends and it is vibrating in its $4^{th}$ harmonic. The equation of the stationary wave is $Y =0.3\,sin\,(0.157\,x) \,cos\,(200\pi t)$. The length of the string is ..... $m$ (all quantities are in $SI$ units)
→A person standing at a distance of $6\,\, m$ from a source of sound receives sound wave in two ways, one directly from the source and other after reflection from a rigid boundary as shown in the figure. The maximum wavelength for which, the person will receive maximum sound intensity, is .... $m$
→The total energy radiated from a black body source is collected for one minute and is used to heat a quantity of water. The temperature of water is found to increase form ${20^o}C$ to ${20.5^o}C$. If the absolute temperature of the black body is doubled and the experiment is repeated with the same quantity of water at ${20^o}C$, the temperature of water will be....... $^oC$
→A fire hydrant delivers water of density $\rho$ at a volume rate $L$. The water travels vertically upward through the hydrant and then does $90^o $ turn to emerge horizontally at speed $V$. The pipe and nozzle have uniform crosssection throughout. The force exerted by the water on the corner of the hydrant is
→Which of the following time measuring devices is most precise? Give reason for your answer.
The temperature of a wire is doubled. The Young’s modulus of elasticity