Question

Heat capacity of water is 18 cal degree mol. The quantity of heat needed to rise temperature of 18 g water by 0.2 C is X cal. Then amount of CH4 (gas) to be burnt to produce X cal of heat is

Answer 1

0.00030448 moles of CH4 are required to produce heat.

Explanation:

Heat capacity of water (C) = 18 cal /degree mol

Mass of water m = 18g

Temperature change ∆T = 0.2 0C

Amount of heat needed to raise the temperature (q)  = ?

q = mC ∆T

= 18X18 X0.2

= 64.8cal

Burning of 1 mole of methane produce 212821.9 Cal of heat

mole = 64.8/ 212821.9

         = 0.00030448 moles

Thus 0.00030448 moles of CH4 are required to produce heat.

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Answer 2

Answer:

0.288 mg

Explanation:

It is given in the below attachment