$5\,\,gm.$ of ice at $0\,^oC$ is dropped in a beaker containing $20\,\,gm.$ of water at $40\,^oC.$ The final temperature will be ........ $^oC$
$16$
$8$
$4$
$32$
The relative humidity on a day, when partial pressure of water vapour is $0.012 \times {10^5}\,Pa$ at $12°C$ is ......... $\%$ (take vapour pressure of water at this temperature as $0.016 \times {10^5}\,Pa$)
In the definition of 'calorie' one calorie is the heat required to raise the temperature of $1\ gram$ of water through $1\ ^oC$ in a certain interval of temperature. The temperature interval is
What is calorimetry ? What is calorimeter ? Explain its principle and construction.
A heater supplying constant power $P$ watts is switched $ON$ at time $t=0 \,min$ to raise the temperature of a liquid kept in a calorimeter of negligible heat capacity. A student records the temperature of the liquid $T(t)$ at equal time intervals. A graph is plotted with $T(t)$ on the $Y$-axis versus $t$ on the $X$-axis. Assume that there is no heat loss to the surroundings during heating. Then,
Heat energy of $184\,kJ$ is given to ice of mass $600\,g$ at $-12^{\circ}\,C$, Specific heat of ice is $2222.3\,J\,kg ^{-1^{\circ}}\,C ^{-1}$ and latent heat of ice in $336\,kJ / kg ^{-1}$
$(A)$ Final temperature of system will be $0^{\circ} C$.
$(B)$ Final temperature of the system will be greater than $0^{\circ} C$.
$(C)$ The final system will have a mixture of ice and water in the ratio of $5: 1$.
$(D)$ The final system will have a mixture of ice and water in the ratio of $1: 5$.
$(E)$ The final system will have water only.
Choose the correct answer from the options given below: