SATHEE: Chemical Thermodynamics Question 442

Chemical Thermodynamics Question 442

Question: The heat of combustion of $C H_{4 (g)},, C_{(g r a p h i t e)}$ and $H_{2 (g)}$ are $20, k c a l,, - 40, k c a l$ and $- 10, k c a l$ respectively. The heat of formation of methane is

Options:

A) $- 4.0, k c a l$

B) $+ 40, k c a l$

C) $- 80, k c a l$

D) $+ 80, k c a l$

Show Answer

Answer:

Correct Answer: C

Solution:

Given, (i) $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$ , $Δ H = + 20$ kcal (ii) $C + O_{2} \to C O_{2}$ , $Δ H = - 40 k c a l .$

(iii) $H_{2} + \frac{1}{2} O_{2} \to H_{2} O$ , $Δ H = - 10 k c a l .$

Aim: $C + 2 H_{2} \to C H_{4}$

(ii) + 2 × (iii) - (i) gives. $Misplaced &$

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Chemical Thermodynamics Question 442

Question: The heat of combustion of $C H_{4 (g)},, C_{(g r a p h i t e)}$ and $H_{2 (g)}$ are $20, k c a l,, - 40, k c a l$ and $- 10, k c a l$ respectively. The heat of formation of methane is

Options:

Answer:

Solution:

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चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

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Chemical Thermodynamics Question 442

Question: The heat of combustion of CH4(g),,C(graphite) and H2(g) are 20,kcal,,−40,kcal and −10,kcal respectively. The heat of formation of methane is

Options:

Answer:

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

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Question: The heat of combustion of $C H_{4 (g)},, C_{(g r a p h i t e)}$ and $H_{2 (g)}$ are $20, k c a l,, - 40, k c a l$ and $- 10, k c a l$ respectively. The heat of formation of methane is