Metallurgical Engineering
GATE MT concept:enthalpy PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:enthalpy
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 16. Imported answers require independent review unless marked reviewed.
Question 20
Open questionMTMCQ1 markNeeds review
Which one of the following is NOT a state function?
Your answerChoose one option.
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Open questionMTMCQ1 markNeeds review
For a regular solution, which one of the following statements is correct?
(ΔHₘᵢₓ is the enthalpy of mixing and ΔSₘᵢₓ is the entropy of mixing)
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 55
Open questionMTNAT2 marksNeeds review
Specific heat capacity at constant pressure (C
) of a solid metal is given by the following equation:C
(in J/mol-K) = 20 + (5 × 10⁻³)·T (for T = 298 K to 1000 K)At constant pressure, if the temperature (T in K) of 2 moles of metal is increased from 300 K to 600 K, the change in enthalpy of the metal (answer in integer) is __________ Joules.
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For an isobaric process, the heat transferred is equal to the change in __________ of the system.
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Consider the following gas-phase reaction:
If the enthalpy of reaction is negative, which one of the following conditions promotes a higher equilibrium concentration of SO3?
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Open questionMTNAT2 marksNeeds review
If for element A, the formation enthalpy and formation entropy per vacancy created are 0.5 eV and
, respectively, then the equilibrium vacancy concentration (in mole fraction) at 500 K is ________
.
(Round off to two decimal places)Given: Boltzmann constant,
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 12
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Formation of an ideal solution leads to
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 36
Open questionMTMCQ2 marksNeeds review
Taking S as entropy, T as temperature, P as pressure, and V as volume, match Column I with Column II.
Column I
(A) Gibbs Free Energy
(B) Helmholtz Free Energy
(C) Enthalpy
(D) Internal Energy
Column II
(1) depends on T, V and composition
(2) depends on T, P and composition
(3) depends on S, P and composition
(4) depends on S, V and composition
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 55
Open questionMTNAT2 marksNeeds review
Enthalpy of formation of an A–B regular solution containing 80 atomic percent A is 3.36
. The activity coefficient of A at 500 K for the solution containing 40 atomic percent A is __________ (round off to 1 decimal place).Given: Universal gas constant, R = 8.314
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The partial molar enthalpy of Au in an Ag-Au melt containing 25 mol% Au at 1400 K is −8300 J·mol⁻¹. Assuming regular solution behavior, the activity of Au in the melt is ______ (round off to 3 decimal places).
Given:
J·K⁻¹·mol⁻¹Log in to check the answer
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