An ideal gas initially at 20°C and 202 kPa has a volume of 4.50 L. It undergoes a quasi-static, isothermal expansion until its pressure is reduced to 84 kPa. (a) Find the work done by the gas. J (b) Find the heat added to the gas during the expansion.

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?