Question
The British thermal unit (Btu) is the energy required to raise the temperature of 1 pound of water by $1^{\circ} \mathrm{F}$. What's 1 Btu in (a) joules; (b) calories?
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We also know that 1 pound is equal to 0.4536 kg and 1 Fahrenheit is equal to $\frac{5}{9}$ Celsius. Show more…
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A British thermal unit (Btu) is defined as the quantity of heat required to change the temperature of 1 lb of water by $1^{\circ} \mathrm{F} .$ Assume the specific heat capacity of water to be independent of temperature. How much heat is required to raise the temperature of the water in a 40 gal water heater from 48 to $145^{\circ} \mathrm{F}$ in (a) $\mathrm{Btu}$; (b) $\mathrm{kcal} ;$ (c) kJ?
The use of the British thermal unit (Btu) is common in much engineering work. A Btu is the amount of heat required to raise the temperature of $1 \mathrm{lb}$ of water by $1^{\circ} \mathrm{F}$. Calculate the number of joules in a Btu.
The BTU (British thermal unit) is the unit of energy most commonly used in the United States. One joule = $9.48 \times 10^{-4} \mathrm{BTU}$. What is the specific heat of water in $\mathrm{BTU} /$ lb $\cdot{ }^{\circ} \mathrm{F} ?$ (Specific heat of water is $\left.4.18 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} .\right)$
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