Given that 1,g of water in liquid phase has v | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The work done during the phase change at constant pressure is given by $W = P \Delta V$.Given $P = 1.013 	imes 10^5\,Pa$ (atmospheric pressure),$

Vedclass · Accepted Answer

$2089$

Vedclass · Answer

(C) The work done during the phase change at constant pressure is given by $W = P \Delta V$.Given $P = 1.013 	imes 10^5\,Pa$ (atmospheric pressure),$V_{liquid} = 1\,cm^3 = 10^{-6}\,m^3$,and $V_{vapour} = 1671\,cm^3 = 1671 	imes 10^{-6}\,m^3$.$W = 1.013 	imes 10^5 	imes (1671 - 1) 	imes 10^{-6} \approx 169\,J$. Using the standard approximation $P = 10^5\,Pa$ as implied by the options: $W = 10^5 	imes 1670 	imes 10^{-6} = 167\,J$.The heat supplied is $Q = mL = 1\,g 	imes 2256\,J/g = 2256\,J$.From the first law of thermodynamics,$Q = \Delta U + W$,so $\Delta U = Q - W$.$\Delta U = 2256\,J - 167\,J = 2089\,J$.

Similar Questions

The internal energy change in a system that has absorbed $2 \; kcal$ of heat and done $500 \; J$ of work is ...... $J$.

The first law of thermodynamics states that:

The volume of one mole of the gas is changed from $V$ to $2V$ at constant pressure $p$. If $\gamma$ is the ratio of specific heats of the gas,what is the change in internal energy of the gas?

$Assertion:$ 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.

Vedclass Test Series

Exam Paper Generator

Online Exam Module