Which of the following equation is used to determine howmuch heat is needed to raise the temperature of a certain mass of the substance through certain degrees?
A) Q = mL
B) Q = m Δt
C) Q = mS Δt
D) Q = it
1 Answers
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Fill in the blanks : (i)A certain amount of _____ is needed to initiate any _____ reaction.
Correct Answer - energy, chemical
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If the temperature of 4 kg mass of a material of specific heat capacity 300 J/ kg °C rises from 20 °C to 30 °C. Find the heat received.
m = 4 kg, s = 300 J/kg °C ∆T = 30 – 20 = 10 °C To find: Heat received (Q) Formula: Q = ms∆T Calculation: From formula, Q = 4 × 300 ×...
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D) specific heat
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If the specific heat is low, the rate of rise or fall in temperature is ………………. for the same quantity of heat supplied.
Correct option is B) more
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Statement I : The amount of heat required to raise the temperature of unit mass of substance
Correct option is A) Both are true
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The amount of heat required to raise the temperature of 1 gm of water to 1°C is ………….. (in Jouls)
Correct option is A) 4.186
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Correct option is D) 106
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The heat energy required to raise the temperature of 20 kg of water from 25° C to 75° C.
Correct option is D) 106 cal
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__________ amount of heat is required to raise the temperature of 100 g of kerosene from 10 °C to 30 °C
Correct option is: (B) 1.02 kcal
2 Answers 1 views