$Assertion :$ The heat supplied to a system is always equal to the increase in its internal energy.
$Reason :$ When a system changes from one thermal equilibrium to another, some heat is absorbed by it.
$Reason :$ When a system changes from one thermal equilibrium to another, some heat is absorbed by it.
AIIMS 2017, Easy
Download our app for free and get started
According to first law of thermodynamics, $\Delta Q = \Delta U + \Delta W = \Delta U +P\Delta V$. If heat is supplied in such a manner that volume does not change $\Delta V = 0$,i.e., isochoric process, then whole of the heat energy supplied to the system will increase internal energy only. But, in any other process it is not possible. Also heat may be adsorbed or evolved when state of thermal equilibrium changes.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1A Car not engine whose low temperate reservoir is at $7\,^oC$ has an efficiency of $50\%$ . It is desired to increase the efficiency to $70\%$ . By how many degrees should the temperature of the high temperature reservoir be increased .... $K$View Solution
- 2A Container having $1\ mole$ of a gas at a temperature $27\ ^oC$ has a movable piston which maintains at constant pressure in container of $1\ atm.$ The gas is compressed until temperature becomes $127^oC.$ The work done is ........ $J$ $(C_p\ for\ gas\ is\ 7.03\ cal/mol-K)$View Solution
- 3$100\ g$ of water is heated from $30^o C$ to $50^o C$. Ignoring the slight expansion of the water, the change in its internal energy is .......$kJ$ (specific heat of water is $4184\ J/kg/K$):View Solution
- 4The temperature inside and outside of refrigerator are $260\, K$ and $315\, K$ respectively. Assuming that the refrigerator cycle is reversible, calculate the heat delivered to surroundings for every joule of work done.View Solution
- 5If $150 J$ of heat is added to a system and the work done by the system is $110 J$, then change in internal energy will be .......... $J$View Solution
- 6An ideal system can be brought from state $A$ to $B$ through four paths as shown in the figure. The energy given to the system is minimum inView Solution
- 7A carnot engine with its cold body at $17\,^oC$ has $50\%$ effficiency. If the temperature of its hot body is now increased by $145\,^oC$, the efficiency becomes...... $\%$View Solution
- 8$1\,g$ of a liquid is converted to vapour at $3 \times 10^5\,Pa$ pressure. If $10 \%$ of the heat supplied is used for increasing the volume by $1600\,cm ^3$ during this phase change, then the increase in internal energy in the process will be $............\,J$View Solution
- 9View SolutionSelect the correct statement for work, heat and change in internal energy.
- 10In a Carnot engine, when ${T_2} = {0^o}C$ and ${T_1} = {200^o}C,$ its efficiency is ${\eta _1}$ and when ${T_1} = 0{\,^o}C$ and ${T_2} = - 200{\,^o}C$, Its efficiency is ${\eta _2}$, then what is ${\eta _1}/{\eta _2}$View Solution