Chemical Engineering
2026 · Paper 1
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Complete GATE CH 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 52–54 of 65. Imported answers require review unless explicitly marked reviewed.
Question 52
Open questionCHNAT2 marksNeeds review
In a double pipe cocurrent heat exchanger, operating at steady state, oil (specific heat capacity = 2100 J kg
°C
) entering at 7 kg s
at 100 °C is used to heat water (specific heat capacity = 4200 J kg
°C
) flowing at 3.5 kg s
from 20 °C to 50 °C. If the overall heat transfer coefficient is 291 W m
°C
, the required heat transfer area (in m
) is ____ (rounded off to one decimal place).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 53
Open questionCHNAT2 marksNeeds review
A pipe with outer diameter of 0.02 m, carries hot water. The temperature at the outer surface of the pipe is 70 °C. This pipe is covered with two concentric layers of insulation, each having a thickness of 0.01 m. The first layer (adjacent to the pipe) is made up of felt material (thermal conductivity k_f = 0.12 W m⁻¹ °C⁻¹), and the next layer is made up of asbestos (thermal conductivity k_as = 0.15 W m⁻¹ °C⁻¹). The insulated pipe is exposed to ambient air at 20 °C. The convection heat transfer coefficient at the outer insulation layer is 3 W m⁻² °C⁻¹. At steady state, neglecting heat transfer due to radiation, the heat loss at the outer insulation layer (in W m⁻¹) is _____ (rounded off to two decimal places).
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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 54
Open questionCHNAT2 marksNeeds review
Methanol is formed by the following gas phase homogeneous reaction:
CO (g) + 2H₂ (g) ⇌ CH₃OH (g)
The standard Gibbs free energies of formation at 298 K for CO and CH₃OH are −137 kJ mol⁻¹ and −162 kJ mol⁻¹, respectively. The value of universal gas constant is 8.314 J mol⁻¹ K⁻¹. The equilibrium constant for the given reaction at 298 K is _____ × 10⁴ (rounded off to one decimal place).
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