For an exothermic reaction ____________________?

Byadmin March 11, 2019August 29, 2021

For an exothermic reaction ____________________?

A. Only enthalpy change (ΔH) is negative
B. Only internal energy change (ΔE) is negative
C. Both ΔH and ΔE are negative
D. Enthalpy change is zero

Thermodynamics for Chemical

Which of the following identities can be most easily used to verify steam table data for superheated steam ?

Which of the following identities can be most easily used to verify steam table data for superheated steam ?

A. (∂T/∂V)S = (∂p/∂S)V
B. (∂T/∂P)S = (∂V/∂S)P
C. (∂P/∂T)V = (∂S/∂V)T
D. (∂V/∂T)P = -(∂S/∂P)T

Read More Which of the following identities can be most easily used to verify steam table data for superheated steam ?
Thermodynamics for Chemical

Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm) ?

Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm) ?

A. Pressure must be kept below 5.2 atm
B. Temperature must be kept above – 57°C
C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
D. Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively

Read More Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm) ?
Thermodynamics for Chemical

Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K) ___________________?

Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K) ___________________?

A. λb/Tb
B. Tb/λb
C. √(λb/Tb)
D. √(Tb/λb)

Read More Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K) ___________________?
Thermodynamics for Chemical

During adiabatic expansion of gas___________________?

During adiabatic expansion of gas___________________?

A. Pressure remains constant
B. Pressure is increased
C. Temperature remains constant
D. None of these

Read More During adiabatic expansion of gas___________________?
Thermodynamics for Chemical

An isolated system can exchange ______________ with its surroundings?

An isolated system can exchange ______________ with its surroundings?

A. Matter
B. Energy
C. Neither matter nor energy
D. Both matter and energy

Read More An isolated system can exchange ______________ with its surroundings?
Thermodynamics for Chemical

Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

A. 0
B. ∞
C. +ve
D. -ve

Read More Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

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