Question

Find the heat given out when 10 g of steam at 100 ºC condenses and cools to water at 50 ºC

Answer 1

Hey there!

Heat given out when 10g of steam at 100°C converts to water at 50°C.

Step 1:- Heat given out when 10g of steam at 100°C coverts into water at 100°C.

Latent heat of vaporization = 540cal
Q = 540×10 = 5400 cal.

Step 2:- Heat given out when 10g water at 100°C converts to water at 50°C.

Here,
Mass = 10g
∆T change in temperature = 100-50 = 50°C

Formula Q = ms∆T

= 10×1×50 = 500Cal.

Adding up these,

5400cal + 500 cal = 5900 Cal.

Therefore 5900 cal heat is given out when 10g of steam at 100°C converts to water at 50°C.

Hope you got that!. any doubt.. ask me

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