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ECAT - Practice Test - Physics - Heat and Thermodynamics Quiz

Attempt 10 MCQs on ECAT - Practice Test - Physics - Heat and Thermodynamics | Quiz 5

41. What heat is needed to boil water at 100°C?



42. Why does steam at 100°C cause more burns than water at 100°C?



43. What is the work done by a gas in an isobaric process?



44. What is the work done in an isothermal process?



45. What does the area under a PV diagram represent?



46. Heat required to raise 2 kg copper from 20°C to 80°C (c=385 J/kg·K).



47. Work done by 2 mol gas isothermally at 300 K expanding from 2 to 4 m³.



48. What is the Carnot efficiency of an engine operating between 500 K and 300 K?



49. A refrigerator with COP=4 removes 200 J from cold. What work is required?



50. An ideal gas (γ=5/3) is adiabatically compressed from 4 m³ to 1 m³, initial P=1 atm. What is final pressure?



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