A fixed amount of ideal gas is taken from an initial state to a final state .

CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A fixed amount of ideal gas is taken from an initial state (Pi,Vi,Ti)=(1.0 atm, 10.0 L, 300 K)(P_i,V_i,T_i)=(1.0\,\text{atm},\,10.0\,\text{L},\,300\,\text{K}) to a final state (Pf,Vf)=(0.50 atm, 20.0 L)(P_f,V_f)=(0.50\,\text{atm},\,20.0\,\text{L}). (a) Calculate the final temperature TfT_f of the gas. (b) Using your answer to part (a), decide whether the change is an isothermal process. Give a suitable reason for your choice. (c) State whether Q=WQ=W or Q≠WQ\neq W for this process, giving a brief explanation without performing any numerical calculation of QQ or WW.

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