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Thermodynamics

# If a system absorbs reversibly 600 J of heat and performs 250 J of work, the increase in internal energy of the system is

$\begin {array} {1 1} (A)\;850\: J & \quad (B)\;350\: J \\ (C)\;250\: J & \quad (D)\;600\: J \end {array}$

$\Delta U = 600-250 = 350\: J$
Ans : (B)