Answer to Question #99877 in Molecular Physics | Thermodynamics for Yasmin jameel

Question

The change of internal energy of an ideal gas is 300 J. What is the total heat added into the gas if it expands for 2.010−3 m3 under 1.01105 Pa

Answer 1

1st law of thermodynamics give it

$$Q=\Delta U+p\Delta V$$

Initial conditions

$$\Delta U=300; p=1.01 \cdot 10^5 (Pa); \Delta V=2.0\cdot 10^{-3} (m^3)$$

Calculating

$$Q=300+1.01\cdot 10^5 \cdot 2.0\cdot 10^{-3}=502 (J)$$