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Heat produced on burning 6.3 g of a fule raises the temperature of 1.5 kg of water from 30⁰C to 60⁰C.Given that the specific heat of water is 4.2 J/g ⁰C.Calculate the calorific value of the fuel.
Options
(a) 30 kJ/mol
(b) 30 kJ/g
(c) 30 kJ/kg
(d) 30 kJ/mg
Correct Answer:
30 kJ/g
Explanation:
Q = msΔt ,
Q = 1.5 x 4.2 x (60-30) x 1000, Q = 189 x 10³ J , Calorific value = 189 x 10³ / 6.3 = 30 kJ/g.
Related Questions: - The most easily hydrolysed molecule under SN1 conditions is
- The oxidising ability of halogens
- HSO₄⁻ + OH⁻ → SO₄²⁻ + H₂O. which is correct about conjugate acid – base pair
- Ethyne can be oxidised to oxalic acid by using
- Translational kinetic energy for 2 moles of gas at 27°C is
Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The most easily hydrolysed molecule under SN1 conditions is
- The oxidising ability of halogens
- HSO₄⁻ + OH⁻ → SO₄²⁻ + H₂O. which is correct about conjugate acid – base pair
- Ethyne can be oxidised to oxalic acid by using
- Translational kinetic energy for 2 moles of gas at 27°C is
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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