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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Chemistry (CY)
Explain these 2 questions?
79 Thermodynamics & Thermochemistry 57. Consider the statements 0) Heat IS either iternal energy or enthalpy in transit depending on the experu 1 when heat is absorbed by the svstem a change of temperature may or may noua5 ) Heat capacity may be positive negative or infinite. avfor ideal and van der wall is 0 T The corTect above are (a) (i), (ii) (b) ). (i) Incorrect statement from the given statement 1S (c) (), (ii) and (iv) (d) All are correct 58 (a) In adiabatic free expansion, internal energy remains constant (b) The ratio of Cp and Cy for ideal gas is dependent on temperature only (c) The difference between heat capacity for ideal gas is not function of temperature (d) In case of van der wall gas Cp is independent of pressure and dependent on temperature 59 a oac obey the van der wall eamation of state the ratio offC. ).and (C. and (C.
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Priyanshu kumar Best Answer
dCv/dT is 0 for real gas and vanderwaal gas..so 4th statement is correct
heat capacity may be negative,positive and infinitive...So 3rd statement is also correct
During phase change,temperature doesn't changes as the heat which is absorbed is used only to separate the molecules during phase change,it is not used to increase in KE of molecules so temp remains same....So 2nd statement is also correct
The heat given off or absorbed when a reaction is run at constant volume is equal to the change in the internal energy of the system. ... The heat given off or absorbed when a reaction is run at constant pressure is equal to the change in the enthalpy of the system. So depend on experimental condition heat is either internal energy or enthalpy...Hence 1st statement is also correct
please accept the answer if you got it😊
all are correct
booklet me ans glt h shayad
yes reshav
book me option b diya h
no it will be d
check previous query too reshav